Make a long note on the topic vitreous hemorrhage for ophthalmology postgraduate exams

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Vitreous hemorrhage: postgraduate exam topic map

A long-answer note on vitreous hemorrhage (VH) can be organised as:

Definition and epidemiology
Applied anatomy and pathogenesis
Etiology
- Proliferative diabetic retinopathy
- Retinal tear and posterior vitreous detachment
- Retinal vein occlusion and other retinal neovascular disorders
- Trauma
- Retinal vasculitis, sickle cell disease, tumors, and systemic hematologic causes
Clinical presentation and differential diagnosis
History and ocular examination
Investigations
- B-scan ultrasonography
- OCT, fluorescein angiography, and systemic work-up after media clears or as indicated
Management
- Immediate assessment and precautions
- Observation and serial review
- Laser photocoagulation and anti-VEGF therapy for the underlying cause
- Indications, timing, and principles of pars plana vitrectomy
Special situations
- Diabetic VH
- VH associated with retinal tear/detachment
- Traumatic VH
- Pediatric VH
Complications, prognosis, and follow-up
Exam-oriented algorithms, tables, and viva points

Brief overview

Vitreous hemorrhage is the extravasation of blood into the vitreous cavity, resulting in floaters, haze, cobweb-like shadows, or sudden painless loss of vision. The central clinical priority is not merely clearing the blood: it is to identify or exclude a retinal tear, retinal detachment, proliferative retinopathy, or ocular trauma.

The major mechanisms are bleeding from retinal or optic-disc neovascularization, rupture of a retinal vessel during posterior vitreous detachment or retinal tear, trauma, and extension of bleeding from adjacent structures. A dense hemorrhage may prevent direct fundus examination. In that setting, urgent B-scan ultrasonography is used to assess retinal status, traction, detachment, intraocular foreign body, mass lesion, and other posterior-segment pathology.

Treatment is cause-directed. Some non-clearing or mild hemorrhages may be observed with close examination and serial ultrasonography. Retinal breaks require retinopexy or surgery as appropriate; proliferative retinal disease generally needs panretinal photocoagulation when the view permits, often with anti-VEGF as an adjunct; and vitrectomy is indicated urgently or electively in selected cases, particularly when there is retinal detachment, non-clearing hemorrhage, tractional disease, or a need for prompt visual rehabilitation.

Which section should I expand into a detailed long note first?

Complete exam answer
Etiology and pathogenesis
Investigations and differential diagnosis
Management and vitrectomy

Expand this into a complete long-answer exam note

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fundus photograph vitreous hemorrhage proliferative diabetic retinopathy

A multi-panel medical image illustrating the clinical manifestations and progression of diabetic retinopathy using fundus photography and Optical Coherence Tomography (OCT). Panel A displays a color fundus photograph of the posterior pole showing microaneurysms and dot hemorrhages indicative of diabetic maculopathy. Panel B highlights clinically significant macular edema (CSME) with visible hard exudates (B1). Panel C provides corresponding OCT imaging, including a retinal thickness heat map and a cross-sectional scan showing intraretinal fluid. Panels D and E are widefield fundus photographs demonstrating advanced proliferative diabetic retinopathy (PDR). Key pathological features identified with numbered arrows include cotton wool spots (D1), venous beading (D2), intraretinal microvascular abnormalities (IRMA) (D3/E1), neovascularization at the disc (D4), and venous loops (D5). Panel E further illustrates end-stage complications and treatment, showing laser photocoagulation scars (E2), retinal neovascularization (E3), pre-retinal hemorrhage (E4), blot hemorrhage (E5), and vitreous hemorrhage (E6). This compilation serves as an educational tool for identifying the transition from non-proliferative to proliferative diabetic disease.

Multi-modal ophthalmic imaging of a patient with proliferative diabetic retinopathy (PDR). (A) Ultra-widefield fundus photograph of the right eye shows evidence of panretinal photocoagulation (PRP) scars in the periphery and tractional retinal detachment (TRD) involving the macula. (B) Ultra-widefield fundus photograph of the left eye demonstrates peripheral PRP laser scars with a flat, attached posterior pole. (C) B-scan ultrasound of the right eye illustrates a high-reflective undulating membrane in the vitreous cavity consistent with TRD, accompanied by low-reflective vitreous opacities suggesting hemorrhage. (D) Optical coherence tomography (OCT) of the right eye provides a cross-sectional view of the macula, revealing a thick, hyper-reflective epiretinal membrane causing significant traction and underlying subretinal fluid (retinal detachment). The images collectively demonstrate advanced diabetic eye disease and the structural complications necessitating surgical intervention.

A multi-modal ophthalmological clinical panel displaying postoperative follow-up findings for a patient with a history of proliferative diabetic retinopathy. Panel A is an anterior segment photograph showing a clear cornea, intact iris with visible surgical peripheral iridectomy, and no acute inflammatory signs. Panel B displays Optical Coherence Tomography (OCT) scans alongside infrared reflectance imaging; the cross-sections demonstrate slight local subretinal fluid and retinal thickening in the macular region, indicating residual macular edema. Panel C is an ultra-widefield fundus photograph showing a mottled, greenish-yellow retinal appearance with laser photocoagulation scars in the periphery and visible retinal vasculature radiating from a defined optic disc, without evident gross retinal detachment. Panel D is a B-scan ocular ultrasound showing a well-attached posterior hyaloid/retinal interface and an acoustically empty vitreous cavity, confirming the absence of significant retinal detachment or dense vitreous hemorrhage. The composite serves as a comprehensive educational assessment of postoperative retinal stability and macular health following diabetic retinopathy surgery.

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Vitreous Hemorrhage

Vitreous and preretinal hemorrhage in proliferative diabetic retinopathy

Definition

Vitreous hemorrhage (VH) is the presence of extravasated blood within the vitreous cavity, including blood in the retrohyaloid, subhyaloid, or formed vitreous gel. It produces visual obscuration of varying severity, from floaters to profound painless loss of vision.

It is a clinical sign and not a diagnosis. The key task is to identify the source of bleeding and, most importantly, exclude a retinal tear or retinal detachment when the fundus view is obscured.

Applied anatomy and sources of blood

The vitreous is normally avascular. Blood may enter it from:

Retinal vessels, especially from a torn retinal vessel or retinal neovascularization.
Optic-disc neovascularization.
Ciliary body or pars plana, particularly after trauma, inflammation, or surgery.
Choroidal circulation, usually in severe trauma or intraocular tumor.
Breakthrough hemorrhage from preretinal or subretinal spaces.

Anatomical planes of hemorrhage

Site	Appearance and clinical importance
Subhyaloid / retrohyaloid	Blood between posterior hyaloid and retina. Often sharply demarcated and boat-shaped when premacular.
Sub-internal limiting membrane hemorrhage	Dome-shaped or localized premacular collection.
Intravitreal hemorrhage	Diffuse red haze, dispersed red cells, or dense fundus-obscuring hemorrhage.
Preretinal hemorrhage	Lies anterior to retina and may coexist with VH.
Subretinal hemorrhage	Blood beneath retina, often associated with choroidal neovascularization, trauma, or retinal vascular disease.

Epidemiology and major causes

The three commonest causes are:

Proliferative diabetic retinopathy (PDR)
Posterior vitreous detachment (PVD), with or without retinal tear
Ocular trauma

Together, these account for most presentations. In older patients, PVD with retinal break is particularly important. In younger patients, trauma, inflammatory retinal vasculopathy, proliferative retinopathies, and inherited vascular disorders should be considered.

Etiology

A. Retinal neovascularization

Fragile new vessels lack normal structural support and may bleed spontaneously or after vitreoretinal traction.

Causes

Proliferative diabetic retinopathy
Ischemic central or branch retinal vein occlusion
Sickle-cell retinopathy
Eales disease
Retinopathy of prematurity
Ocular ischemic syndrome
Radiation retinopathy
Retinal vasculitis, for example tubercular, sarcoid-related, or idiopathic vasculitis
Retinal capillary hemangioma in von Hippel-Lindau disease
Familial exudative vitreoretinopathy

PDR

Retinal ischemia stimulates VEGF release, causing neovascularization at the disc or elsewhere. The new vessels proliferate along the posterior hyaloid. Traction on these vessels during vitreous contraction or PVD causes recurrent preretinal and vitreous hemorrhage. Subsequent fibrovascular contraction can lead to tractional retinal detachment.

The Wills Eye Manual, p. 817-819
Harrison's Principles of Internal Medicine, diabetic retinopathy section

B. Posterior vitreous detachment and retinal break

Acute PVD can avulse a retinal vessel, especially at sites of firm vitreoretinal adhesion. It may also cause a horseshoe retinal tear. A tear associated with VH must be treated as high risk because rhegmatogenous retinal detachment may develop.

Clinical clues

Sudden onset floaters
Photopsia
Smoky vision or “shower of black dots”
Acute painless visual reduction
Pigment cells in the anterior vitreous, called Shafer sign or tobacco dust
Peripheral retinal tear on indirect ophthalmoscopy with scleral depression

A dense spontaneous VH, especially with no known PDR, should raise strong suspicion of an occult retinal tear even if B-scan is initially negative.

Recent evidence should make the examiner cautious about routine prolonged observation in severe non-diabetic fundus-obscuring VH. A 2024 systematic review reported retinal tear and/or detachment at presentation in approximately 62% to 75% of such cases, while B-scan sensitivity for underlying tears or detachment was variable. This supports early surgical consideration in selected severe cases. Recent systematic review

C. Retinal vascular disorders

Branch retinal vein occlusion: VH usually results from peripheral retinal neovascularization in ischemic disease.
Central retinal vein occlusion: May cause VH in proliferative or ischemic disease.
Retinal arterial macroaneurysm: Rupture can produce multilayered hemorrhage, including preretinal and vitreous hemorrhage.
Hypertensive retinopathy: Rarely causes VH directly, but vascular complications may coexist.

D. Trauma

Blunt trauma

Mechanisms include:

Avulsion of retinal vessels
Retinal dialysis or retinal tear
Choroidal rupture
Traumatic retinal detachment
Ciliary body injury
Associated hyphema or angle recession

Penetrating trauma

Consider:

Open-globe injury
Intraocular foreign body
Retinal laceration or incarceration
Endophthalmitis risk

Important: In suspected open globe, avoid pressure on the eye and avoid B-scan until globe integrity has been addressed. Orbital CT is useful for assessing an intraocular foreign body.

E. Other ocular causes

Wet age-related macular degeneration with breakthrough hemorrhage
Retinal tears associated with lattice degeneration
Choroidal melanoma or other intraocular tumor
Toxocariasis
Posterior uveitis and pars planitis
Retinal cavernous hemangioma
Coats disease
Postoperative bleeding after vitreoretinal surgery, cataract surgery, glaucoma surgery, or intravitreal procedures
Uveitis-glaucoma-hyphema syndrome
Neovascular glaucoma

F. Systemic causes

Diabetes mellitus
Hypertension
Sickle-cell disease
Leukemia and other hematologic malignancies
Thrombocytopenia
Coagulation disorders
Anticoagulant or antiplatelet therapy, usually contributory rather than the sole explanation
Severe anemia or blood dyscrasia
Subarachnoid hemorrhage, producing Terson syndrome

Terson syndrome

Terson syndrome is intraocular hemorrhage, including preretinal, retinal, or vitreous hemorrhage, associated with subarachnoid hemorrhage or other acute intracranial hemorrhage. It is often bilateral and should be suspected in a patient with severe sudden headache, altered sensorium, or coma.

G. Pediatric causes

In infants and children, consider:

Birth trauma
Non-accidental injury, including shaken baby syndrome
Retinopathy of prematurity
Persistent fetal vasculature
Familial exudative vitreoretinopathy
X-linked retinoschisis
Pars planitis
Toxocariasis
Coagulation disorders
Leukemia
Retinoblastoma or other masquerade syndromes

A child with VH requires careful evaluation because amblyopia, retinal detachment, trauma, and malignancy may coexist.

Pathogenesis

VH occurs by one or more of the following mechanisms:

Bleeding from pathologic neovascularization
Fragile new vessels rupture spontaneously or after vitreous traction.
Rupture of a normal retinal vessel during acute PVD
Vitreous traction may avulse a retinal vessel or create a retinal tear.
Direct mechanical injury
Trauma may damage retina, choroid, ciliary body, or retinal vessels.
Extension of adjacent hemorrhage
Blood may break through from preretinal, subretinal, or choroidal locations.
Defective hemostasis
Blood dyscrasia or anticoagulation may increase the severity or persistence of bleeding.

Fate of blood in the vitreous

Initially, red cells disperse through the vitreous gel, causing diffuse haze. With time, erythrocytes undergo hemolysis and hemoglobin breakdown. Chronic VH may acquire a yellow-brown or ocher appearance. Persistent hemorrhage can cause inflammatory response, vitreous organization, epiretinal membrane formation, hemosiderosis, ghost-cell glaucoma, or proliferative vitreoretinopathy.

Clinical features

Symptoms

Sudden, painless reduction of vision
Floaters, black spots, cobwebs, haze, or “smoke”
Red or dark visual haze
Photopsia or floaters suggestive of acute PVD or retinal tear
Visual-field defect or curtain may suggest retinal detachment
Severe hemorrhage may result in hand-movements or perception-of-light vision only

The Wills Eye Manual describes sudden painless loss of vision, black spots, cobwebs, or haze as typical symptoms (p. 817).

Signs

Anterior segment

Red blood cells in anterior vitreous
Occasionally hyphema
Iris or angle neovascularization
Raised IOP due to ghost-cell or hemolytic glaucoma
Hypotony in open-globe injury
Associated signs of inflammation or trauma

Posterior segment

Mild VH: partial fundal haze; retinal details may be visible.
Dense VH: absent or markedly reduced red reflex; no fundus view.
Preretinal hemorrhage: localized boat-shaped or D-shaped collection.
Chronic VH: yellow-ochre discoloration due to hemoglobin degradation.
Underlying retinal tear, detachment, neovascularization, fibrovascular proliferation, tumor, or vascular occlusion may be visible if the view permits.

A relative afferent pupillary defect may occur in a dense VH but should prompt consideration of optic neuropathy, extensive retinal detachment, or severe ischemic retinal disease.

Classification

1. According to severity

Grade	Description
Mild	Red cells or small hemorrhage with fundus details visible
Moderate	Hazy view with partial obscuration of retina
Dense / severe	Fundus cannot be adequately visualized

2. According to location

Subhyaloid
Sub-ILM
Preretinal
Intravitreal
Combined intraocular hemorrhage

3. According to cause

Proliferative / neovascular
PVD-related
Retinal tear or retinal detachment related
Traumatic
Inflammatory
Tumor-related
Hematologic or systemic

Differential diagnosis

Condition	Distinguishing points
Vitritis	White inflammatory cells rather than red cells; may have uveitis, pain, photophobia, or chronic symptoms
Retinal detachment without VH	Flashes, floaters, curtain; retinal elevation visible if media clear
Posterior vitreous detachment	Floaters and photopsia but no blood unless retinal vessel or tear is involved
Asteroid hyalosis	Chronic, asymptomatic, sparkling white opacities
Vitreous degeneration / syneresis	No red cells, usually gradual floaters
Endophthalmitis	Pain, redness, hypopyon, marked inflammation, reduced red reflex
Choroidal detachment	Smooth peripheral elevations, often postoperative or hypotony related
Intraocular tumor	Mass lesion on B-scan, associated exudative detachment or sentinel vessels

Evaluation

Objectives

Confirm the presence and density of VH.
Detect a retinal tear or retinal detachment.
Identify the source of hemorrhage.
Determine urgency of treatment.
Assess the fellow eye.
Evaluate systemic disease where relevant.

History

Ask specifically about:

Ocular symptoms

Exact onset and progression
Floaters, flashes, curtain or visual-field defect
Prior episodes of VH
Pre-existing poor vision
Pain, redness, photophobia
Recent ocular surgery or intravitreal injection
High myopia, previous retinal tear, retinal detachment, or laser treatment

Trauma

Blunt or penetrating trauma
Foreign body exposure, especially hammering, grinding, or metal work
Recent assault or sports injury

Systemic history

Diabetes and retinopathy status
Hypertension
Sickle-cell disease
Coagulation disorder
Leukemia or other hematological disease
Anticoagulant and antiplatelet use
Severe headache, loss of consciousness, or intracranial hemorrhage symptoms

Ocular examination

Visual acuity in both eyes.
Pupillary reactions, including RAPD.
IOP.
External examination for trauma, lid laceration, ecchymosis, or proptosis.
Slit-lamp examination:
- Anterior chamber cells, flare, hyphema
- Iris neovascularization
- Red cells in anterior vitreous
- Lens status and pseudophakia
Dilated indirect ophthalmoscopy in both eyes.
Scleral depression, if safe and a retinal view is possible, to search for retinal breaks.
Fellow-eye examination, which may reveal diabetic retinopathy, retinal neovascularization, sickle-cell changes, retinal tears, or other clues to cause.

Investigations

1. B-scan ultrasonography

B-scan is mandatory when the retina cannot be adequately visualized.

It helps detect

Dense VH
Posterior vitreous detachment
Retinal tear, though small tears can be missed
Rhegmatogenous retinal detachment
Tractional retinal detachment
Choroidal detachment
Intraocular foreign body
Intraocular tumor
Vitreoretinal membranes and traction

On ultrasound, fresh VH may appear as low-amplitude mobile echoes. Organized blood produces denser, more mobile membranous echoes. A retinal detachment is an echogenic undulating membrane, usually tethered at the optic disc posteriorly and ora serrata anteriorly.

Tintinalli's Emergency Medicine, vitreous hemorrhage ultrasonography section
The Wills Eye Manual, p. 819-820

Caution: A negative B-scan does not completely exclude a small retinal tear. Serial ultrasound and repeat dilated examination are required if observation is chosen.

2. Optical coherence tomography

OCT is useful when the macula can be imaged to detect:

Diabetic macular edema
Macular traction
Epiretinal membrane
Subretinal fluid
Premacular subhyaloid or sub-ILM hemorrhage
Macular hole

3. Fundus fluorescein angiography

Useful after partial clearing of media, or in mild-to-moderate VH, to identify:

Retinal or disc neovascularization
Capillary non-perfusion
Retinal vasculitis
Proliferative diabetic retinopathy
Ischemic retinal vein occlusion

4. Ocular CT

Indicated in suspected open-globe injury or intraocular foreign body. Do not delay management of an open globe for imaging.

5. Systemic investigations

Not required indiscriminately. Order according to the suspected cause:

Blood pressure measurement
Blood glucose and HbA1c
Complete blood count and platelet count
PT/INR and aPTT when bleeding disorder or anticoagulant effect is suspected
Sickle-cell testing where indicated
Hematologic work-up if leukemia or blood dyscrasia is suspected
Neuroimaging if Terson syndrome or intracranial hemorrhage is suspected

Management

Principles

Treat VH as an urgent ophthalmic problem until retinal tear/detachment is excluded.
Identify and treat the underlying pathology.
Preserve vision by preventing or treating retinal detachment, neovascularization, traction, and secondary glaucoma.
Use serial clinical and ultrasound evaluation if observation is selected.
Perform pars plana vitrectomy when diagnostic, therapeutic, or rehabilitative benefit outweighs surgical risk.

Immediate management

Explain retinal-detachment warning symptoms: new flashes, increase in floaters, curtain, worsening visual field, or sudden further visual decline.
Avoid unnecessary exertion in the acute phase.
Elevate the head during rest or sleep to allow blood to settle inferiorly and facilitate examination of the superior retina.
Review urgently, often within days, based on severity and suspected cause.
Manage systemic hypertension, diabetes, or coagulopathy in coordination with the appropriate physician.
Do not discontinue anticoagulants or antiplatelet drugs without considering the indication and consulting the treating physician.

Observation

Observation may be appropriate when:

Retinal examination is adequate and excludes tear/detachment.
B-scan shows an attached retina without suspicious traction or mass.
The cause is known and low risk.
Hemorrhage is mild or clearing.
The patient can return promptly for repeat examination.

Follow-up during observation

Repeat dilated fundus examination with scleral depression as the blood clears.
Repeat B-scan ultrasonography when the view remains inadequate.
Monitor IOP.
Assess for development of retinal detachment, traction, neovascularization, or non-clearing VH.

Observation should be cautious in a first episode of dense, non-diabetic, fundus-obscuring VH because retinal breaks may remain occult.

Cause-specific management

A. PVD with retinal tear

Prompt laser photocoagulation around the retinal break if adequate visualization is possible.
Cryotherapy may be used when laser uptake is not feasible, but is generally used selectively.
If the break cannot be adequately treated because of dense VH, or there is a detachment, perform pars plana vitrectomy with endolaser and retinal-detachment repair as indicated.

B. Rhegmatogenous retinal detachment

Urgent vitreoretinal surgical management. The method depends on the retinal configuration and may include:

Pars plana vitrectomy
Endolaser
Gas tamponade
Scleral buckling
Silicone oil in selected complex cases

C. Proliferative diabetic retinopathy

Panretinal photocoagulation (PRP) is the main treatment when the retina can be visualized.
Intravitreal anti-VEGF therapy can cause rapid regression of neovascularization and may be used as an adjunct in selected situations.
Dense VH that precludes PRP, recurrent VH, traction threatening or involving the macula, or tractional retinal detachment generally requires pars plana vitrectomy with endolaser PRP.

Anti-VEGF treatment alone may not provide durable control in every patient and requires reliable follow-up. In advanced PDR with substantial fibrovascular proliferation, the timing of anti-VEGF before surgery must be individualized because rapid involution of neovascular tissue may occasionally worsen traction.

D. Retinal vein occlusion

Treat retinal ischemia and neovascularization with PRP.
Manage macular edema with anti-VEGF therapy where indicated.
Vitrectomy is considered for dense non-clearing VH or associated traction/detachment.

E. Sickle-cell retinopathy and Eales disease

Treat peripheral non-perfusion and neovascularization with sectoral scatter laser or PRP as appropriate.
Control associated inflammation or systemic disease.
Vitrectomy is indicated for non-clearing VH, retinal detachment, or significant traction.

F. Traumatic VH

Exclude open globe, retinal tear, retinal dialysis, detachment, choroidal rupture, and intraocular foreign body.
Urgent surgery is indicated for open globe or intraocular foreign body.
Vitrectomy may be needed for non-clearing VH, retinal detachment, retinal incarceration, or proliferative vitreoretinopathy.

G. Terson syndrome

Urgent neurologic management takes priority.
Ophthalmic observation is possible if hemorrhage is clearing.
Vitrectomy may be needed for dense persistent VH, particularly when visual rehabilitation is delayed.

Pars plana vitrectomy

Indications

Urgent or early vitrectomy

Retinal detachment identified or strongly suspected
Retinal break that cannot be treated adequately because of obscuring VH
Dense unexplained VH with inadequate 360-degree retinal examination, especially if associated with PVD or suspicion of occult retinal tear
Intraocular foreign body
Open-globe trauma after primary repair, when indicated
Endophthalmitis with dense media opacity
VH associated with iris or angle neovascularization
Ghost-cell glaucoma or hemolytic glaucoma not controlled medically
Tractional retinal detachment threatening or involving the macula

Elective vitrectomy

Dense non-clearing VH
Recurrent VH that prevents treatment of the underlying proliferative retinopathy
PDR with VH preventing PRP
Persistent premacular hemorrhage causing significant visual disability
Need for early visual rehabilitation in selected patients

Objectives of surgery

Remove hemorrhagic vitreous
Identify occult retinal breaks
Relieve vitreoretinal traction
Repair retinal tears/detachment
Remove fibrovascular tissue where required
Apply endolaser PRP or focal laser
Use gas or silicone oil tamponade if indicated

Complications of vitrectomy

Iatrogenic retinal break or retinal detachment
Cataract progression, especially in phakic patients
Endophthalmitis
Recurrent VH
Raised IOP or hypotony
Cystoid macular edema
Epiretinal membrane
Need for repeat surgery

Complications of vitreous hemorrhage

Missed retinal tear and rhegmatogenous retinal detachment
Tractional retinal detachment, especially in PDR
Persistent visual disability from non-clearing blood
Secondary glaucoma
- Ghost-cell glaucoma
- Hemolytic glaucoma
- Neovascular glaucoma
Proliferative vitreoretinopathy
Epiretinal membrane and macular traction
Hemosiderosis bulbi in chronic long-standing hemorrhage
Amblyopia in children
Complications due to underlying disease, such as diabetic macular edema or retinal ischemia

Prognosis

Prognosis depends primarily on the cause and associated retinal or optic nerve pathology.

Favorable prognosis

Mild hemorrhage
Isolated PVD without retinal tear
VH with attached retina and a treatable underlying lesion
Rapid spontaneous clearing
Timely PRP in proliferative retinal disease

Guarded or poor prognosis

Dense long-standing VH
Retinal detachment
Advanced PDR with macular traction
Severe ocular trauma
Intraocular foreign body
Neovascular glaucoma
Optic neuropathy or extensive retinal ischemia
Delayed detection of retinal tear or detachment

Practical clinical algorithm

Patient with acute painless visual haze or sudden floaters

Step 1: Assess

Visual acuity, pupils, IOP
Slit lamp for cells, red blood cells, hyphema, iris neovascularization
Dilated fundus examination and indirect ophthalmoscopy

Step 2: Can the peripheral retina be examined completely?

If yes

Identify retinal tear, detachment, PDR, vascular occlusion, trauma, or other source.
Treat cause appropriately.
Use laser for retinal breaks or PRP for neovascular disease when feasible.

If no

Perform B-scan ultrasonography.
If retinal detachment, retinal tear, mass, foreign body, or significant traction is found or suspected: urgent vitreoretinal referral and surgery as indicated.
If retina appears attached but VH is dense and cause is unknown: close repeat review and serial ultrasound, with a low threshold for early vitrectomy.

Step 3: Evaluate systemic disease

Diabetes, hypertension, blood dyscrasia, anticoagulants, sickle-cell disease, and neurologic symptoms where appropriate.

Short note: key exam points

VH presents with sudden painless floaters, haze, cobwebs, or visual loss.
The commonest causes are PDR, PVD with or without retinal tear, and trauma.
A dense VH with no fundus view requires B-scan ultrasonography.
A negative B-scan does not fully exclude a small retinal tear.
The clinician must always consider retinal tear and retinal detachment.
Examine the fellow eye, especially for PDR, retinal vascular disease, or sickle-cell retinopathy.
PRP treats retinal neovascularization when media are sufficiently clear.
Pars plana vitrectomy is indicated for retinal detachment or break, dense unexplained/non-clearing VH, VH preventing necessary retinal treatment, intraocular foreign body, selected traumatic cases, and VH with secondary glaucoma or tractional disease.
In children, think of non-accidental injury, retinoblastoma, ROP, bleeding dyscrasia, and amblyopia.

Viva questions

What is the most important diagnosis to exclude in dense VH?
Retinal tear with rhegmatogenous retinal detachment.

What is the investigation of choice when the fundus cannot be visualized?
B-scan ultrasonography.

What are the commonest causes of VH?
PDR, acute PVD with or without retinal tear, and ocular trauma.

Why is VH common in PDR?
Traction or spontaneous rupture of fragile retinal or disc neovascularization.

What is the role of PRP?
It treats retinal ischemia-driven neovascularization and reduces the risk of recurrent hemorrhage and tractional complications.

When is vitrectomy indicated?
For retinal detachment/break, dense unexplained or non-clearing VH, inability to treat the causal retinal pathology, tractional disease, foreign body, and selected secondary glaucomas.

What is Terson syndrome?
Intraocular hemorrhage, often preretinal or vitreous, associated with subarachnoid or intracranial hemorrhage.

Suggested reading: The Wills Eye Manual - Office and Emergency Room Diagnosis and Treatment of Eye Disease, “Vitreous Hemorrhage,” p. 817-820.

Write a long note on traumatic glaucoma for ophthalmology pg examination

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Traumatic Glaucoma

Definition

Traumatic glaucoma is secondary glaucoma caused by ocular trauma, with raised intraocular pressure (IOP) resulting from damage to the anterior-segment angle, trabecular meshwork, iris, lens, vitreous, or other ocular structures.

It may occur:

Immediately after injury
Days to weeks later
Months to years, or even decades, after trauma

It is most often associated with blunt closed-globe trauma, but may also follow penetrating injury, intraocular foreign body, chemical injury, surgery for trauma, or long-standing traumatic vitreous hemorrhage.

Importance

Traumatic glaucoma is significant because:

The IOP rise may be acute and severe, threatening the optic nerve and cornea.
It may occur long after an apparently trivial injury.
Angle recession after blunt trauma can produce delayed chronic open-angle glaucoma.
Associated injuries such as hyphema, lens dislocation, retinal tear, retinal detachment, and traumatic optic neuropathy may determine the final visual prognosis.
Patients with traumatic hyphema require long-term surveillance for angle recession and glaucoma.

Etiology and classification

Traumatic glaucoma may be classified according to the nature of trauma and time of presentation.

A. Closed-globe or blunt trauma

Early causes of raised IOP

Hyphema with obstruction of trabecular meshwork by red blood cells
Trabeculitis and traumatic iridocyclitis
Direct trabecular meshwork injury
Pigment dispersion and iris debris
Pupillary block from lens subluxation, dislocation, vitreous prolapse, or swollen lens
Lens particle glaucoma after traumatic capsular rupture
Acute angle closure due to anterior lens displacement
Retained intraocular material following trauma

Late causes

Angle recession glaucoma
Peripheral anterior synechiae causing secondary angle closure
Ghost-cell glaucoma after vitreous hemorrhage
Hemolytic glaucoma
Lens-induced glaucoma
Traumatic cataract with phacomorphic glaucoma
Phacoantigenic glaucoma following rupture of the lens capsule
Siderosis bulbi from a retained iron intraocular foreign body
Epithelial or fibrous downgrowth after penetrating trauma
Neovascular glaucoma secondary to retinal detachment, retinal ischemia, or severe ocular trauma

B. Open-globe trauma

Lens capsule rupture with lens particle or phacoantigenic glaucoma
Retained intraocular foreign body
Epithelial downgrowth
Peripheral anterior synechiae
Vitreous incarceration in wound
Post-traumatic inflammation
Secondary angle closure
Ghost-cell glaucoma after vitreous hemorrhage
Secondary glaucoma after repair of globe injury

Pathophysiology

Mechanism of blunt trauma

A blunt object causes sudden anteroposterior compression of the globe with simultaneous equatorial expansion. The resulting shock wave displaces aqueous humor peripherally and posteriorly, stretching the limbus and anterior chamber angle.

This can cause:

Tearing of iris sphincter
Iridodialysis
Hyphema from rupture of iris or ciliary-body vessels
Separation of ciliary muscle fibers causing angle recession
Cyclodialysis cleft
Trabecular meshwork damage
Zonular rupture and lens subluxation/dislocation
Retinal and choroidal injury

The AAO review of angle recession describes this axial compression and equatorial expansion as the basis of the characteristic angle injury.

Mechanisms of IOP elevation

1. Hyphema-associated glaucoma

Pathogenesis

Following blunt trauma, rupture of vessels of the iris root, ciliary body, or anterior chamber angle produces hyphema. Red cells, fibrin, inflammatory cells, pigment, and blood degradation products obstruct the trabecular meshwork, reducing aqueous outflow.

IOP may rise due to:

Mechanical blockage by erythrocytes
Clot blocking the angle
Inflammatory debris
Trabecular meshwork injury
Peripheral anterior synechiae
Pupillary block in total hyphema

A small hyphema may still produce substantial IOP elevation. The risk rises with a large or total hyphema, recurrent bleeding, and pre-existing optic nerve disease. Severe and sustained IOP elevation may cause optic neuropathy and corneal blood staining. Kanski's Clinical Ophthalmology, 10th ed., p. 395.

Rebleeding

Secondary hemorrhage commonly occurs 3 to 5 days after the original trauma and may be more severe than the initial bleed. It increases the risk of raised IOP, corneal blood staining, peripheral anterior synechiae, optic nerve damage, and reduced final visual acuity. Kanski's Clinical Ophthalmology, 10th ed., p. 395.

Sickle-cell disease or trait

In sickle-cell hemoglobinopathy, red cells may sickle in the relatively hypoxic and acidic anterior chamber. These deformed cells obstruct the trabecular meshwork more readily and can lead to disproportionately severe IOP elevation and optic nerve damage.

Patients at risk should be evaluated appropriately for sickle-cell disease or trait, especially in populations where it is prevalent.

2. Traumatic iritis and trabeculitis

Blunt trauma may cause acute anterior uveitis. Initially, ciliary-body shutdown can produce normal or low IOP. As aqueous production recovers, inflammatory cells, fibrin, pigment, and protein accumulate in the angle, impairing trabecular outflow and raising IOP.

Chronic or inadequately treated inflammation may later cause:

Posterior synechiae
Peripheral anterior synechiae
Secondary angle closure
Steroid-induced IOP elevation in susceptible patients

3. Angle-recession glaucoma

Definition

Angle recession is a tear between the circular and longitudinal fibers of the ciliary muscle, causing abnormal widening of the ciliary-body band on gonioscopy.

It is a common sequela of blunt trauma, particularly in eyes with traumatic hyphema. However, the presence of angle recession does not itself invariably produce glaucoma.

Gonioscopic features

Broad, deepened ciliary-body band
Irregular widening of angle recess
Torn iris processes
Increased trabecular pigmentation
Associated peripheral anterior synechiae
Comparison with the fellow eye is useful

Gonioscopy should be performed once the acute phase has resolved and the eye is stable. It should be deferred in acute hyphema or suspected open-globe injury.

Pathogenesis of delayed glaucoma

Glaucoma arises not simply from the widened angle but from associated damage and subsequent scarring of the trabecular meshwork. The IOP rise may occur years after the injury.

Risk increases with:

Angle recession involving more than 180 degrees
Traumatic hyphema
High initial IOP
Marked angle pigmentation
Lens injury
Absence of a cyclodialysis cleft
Significant trabecular damage

Although angle recession is common after blunt trauma, only a minority develop glaucoma. Kanski notes that glaucoma develops in fewer than 10% of affected eyes after 10 years, with risk related to the extent of recession. Kanski's Clinical Ophthalmology, 10th ed., p. 396.

A recession exceeding 180 degrees is a significant risk marker, though glaucoma can occur with less extensive recession, as summarized in the AAO discussion of angle-recession glaucoma.

4. Lens-related traumatic glaucoma

A. Lens subluxation or dislocation

Trauma can rupture zonules, allowing the lens to become subluxated or dislocated.

Mechanisms of glaucoma include:

Pupillary block
Anterior displacement of the lens with angle closure
Direct lens-cornea contact with endothelial damage
Vitreous prolapse causing block

Anterior lens dislocation is an ophthalmic urgency. Immediate IOP reduction is needed, followed by definitive lens extraction when appropriate. Kanski's Clinical Ophthalmology, 10th ed., p. 394-395.

B. Lens particle glaucoma

Following traumatic rupture of the lens capsule, lens cortical particles enter the anterior chamber and obstruct the trabecular meshwork. It generally presents with inflammation and raised IOP after lens capsule disruption.

C. Phacoantigenic glaucoma

Lens proteins escaping through a ruptured capsule may provoke a granulomatous inflammatory response. It presents with marked anterior uveitis, raised IOP, and often a traumatic cataract.

D. Phacomorphic glaucoma

Traumatic cataract or lens swelling can cause forward displacement of the iris-lens diaphragm, shallowing the anterior chamber and producing secondary angle closure.

5. Ghost-cell glaucoma

Ghost-cell glaucoma is an open-angle glaucoma due to obstruction of the trabecular meshwork by degenerated erythrocytes.

Pathogenesis

After vitreous hemorrhage, erythrocytes lose hemoglobin and become rigid, khaki-colored “ghost cells.” They usually develop approximately 2 weeks after the hemorrhage. If the anterior hyaloid face is disrupted, as may occur after trauma, surgery, or posterior capsule rupture, these cells migrate into the anterior chamber and obstruct the trabecular meshwork.

Clinical features include:

History of trauma and vitreous hemorrhage
Raised IOP
Open angle
Fine khaki or tan cells in anterior chamber
Often a preceding delay of weeks after the hemorrhage

Ghost-cell glaucoma is caused by trabecular obstruction by degenerated erythrocytes. Kanski's Clinical Ophthalmology, 10th ed., p. 397.

Treatment includes IOP-lowering therapy and management of the vitreous hemorrhage. Vitrectomy may be required when a persistent vitreous blood reservoir continues to generate ghost cells.

6. Hemolytic glaucoma

Hemolytic glaucoma may occur after long-standing intraocular hemorrhage. Macrophages laden with hemoglobin and erythrocyte breakdown products obstruct the trabecular meshwork. It resembles ghost-cell glaucoma but results from a different cell population and mechanism.

7. Glaucoma due to intraocular foreign body

A retained iron-containing foreign body can lead to siderosis bulbi, which causes progressive damage to ocular tissues including the trabecular meshwork. It may result in secondary open-angle glaucoma, cataract, retinal degeneration, and poor visual outcome.

Copper foreign bodies may cause chalcosis or severe toxic inflammation, depending on copper content.

8. Secondary angle-closure glaucoma after trauma

Angle closure can result from:

Extensive peripheral anterior synechiae
Pupillary block from lens dislocation or vitreous prolapse
Total hyphema
Iris bombe after severe inflammation
Epithelial or fibrous downgrowth
Neovascularization of the iris and angle
Aqueous misdirection in complex postoperative traumatic eyes

Clinical features

Symptoms

Symptoms depend on the timing and degree of IOP elevation:

Blurred vision
Ocular pain
Headache
Halos around lights
Red eye
Photophobia, if traumatic iritis is present
Floaters or visual haze from hyphema or vitreous hemorrhage
Nausea and vomiting in acute severe IOP elevation

Late angle-recession glaucoma is often asymptomatic until optic nerve damage or visual-field loss occurs.

Signs

External and anterior segment signs

Periocular bruising, lid edema, or laceration
Conjunctival chemosis or subconjunctival hemorrhage
Corneal edema due to high IOP
Corneal blood staining in prolonged total hyphema
Hyphema or microhyphema
Iris sphincter tear and traumatic mydriasis
Iridodialysis
Traumatic iritis
Lens subluxation, phacodonesis, or lens dislocation
Traumatic cataract
Aphakia
Vitreous in anterior chamber
Wound leak or shallow anterior chamber in open-globe injury

Gonioscopy

Angle recession
Trabecular pigmentation
Peripheral anterior synechiae
Cyclodialysis cleft
Iridodialysis
Foreign material
Blood or ghost cells in angle

Posterior segment examination

Look for:

Vitreous hemorrhage
Commotio retinae
Retinal tear or retinal detachment
Choroidal rupture
Traumatic optic neuropathy
Retained intraocular foreign body
Macular injury

Evaluation

Initial priorities

The first priority is to exclude an open-globe injury.

Features suggesting open globe include:

Markedly reduced visual acuity
Irregular or peaked pupil
Shallow or flat anterior chamber
Low IOP or hypotony
Positive Seidel test
Extrusion of uveal tissue or vitreous
360-degree subconjunctival hemorrhage
Dense traumatic cataract or lens disruption

Do not perform tonometry, gonioscopy, scleral depression, or pressure on the globe when open globe is suspected. Protect the eye with a rigid shield, keep the patient nil by mouth, give appropriate systemic medication and antibiotics, arrange CT imaging when indicated, and obtain urgent ophthalmic surgery.

Ocular assessment after globe integrity is established

Visual acuity in both eyes.
Pupillary reactions and relative afferent pupillary defect.
IOP measurement.
Slit-lamp examination.
Assessment and grading of hyphema.
Corneal examination for blood staining.
Lens position and integrity.
Dilated fundus examination.
Gonioscopy after the acute phase.
Optic disc examination.
Baseline automated visual field and OCT retinal nerve fiber layer assessment when feasible.

Investigations

B-scan ultrasonography if the fundus is obscured by hyphema, vitreous hemorrhage, or media opacity.
Orbital CT scan in penetrating trauma or suspected intraocular foreign body.
Ultrasound biomicroscopy or anterior-segment OCT for angle recession, cyclodialysis cleft, zonular injury, lens position, and occult anterior segment pathology.
Sickle-cell screening in appropriate patients with hyphema.
Complete blood count and coagulation studies if bleeding disorder is suspected.

Management

General principles

Treat acute ocular trauma as an emergency.
Exclude open globe before any pressure-based examination.
Identify the mechanism of raised IOP.
Treat associated injuries.
Reduce IOP promptly when the optic nerve or cornea is threatened.
Arrange long-term monitoring for angle recession and glaucomatous optic neuropathy.

Management of traumatic hyphema

Conservative measures

Protective rigid eye shield
Restrict strenuous activity
Head elevation, including during sleep
Avoid eye rubbing and Valsalva maneuver
Avoid aspirin and nonsteroidal anti-inflammatory drugs because of rebleeding risk
Review anticoagulation only in coordination with the physician responsible for its indication
Frequent examination during the period of risk of rebleeding

Kanski advises activity restriction, upright or semi-upright positioning, and a protective shield. Kanski's Clinical Ophthalmology, 10th ed., p. 395-396.

Medical treatment

Topical corticosteroid to reduce inflammation
Cycloplegic, commonly atropine in larger hyphema, to reduce discomfort, stabilize the blood-aqueous barrier, and reduce iris movement
Topical beta-blocker
Topical alpha-2 agonist
Topical or systemic carbonic anhydrase inhibitor, where appropriate
Hyperosmotic agent, such as mannitol, in severe uncontrolled IOP elevation
Antifibrinolytic treatment may be considered in selected high-risk patients, according to local protocol

Important cautions

Avoid miotics in traumatic hyphema because they can worsen inflammation, increase pupillary block risk, and disrupt the blood-aqueous barrier.
Avoid carbonic anhydrase inhibitors, especially systemic acetazolamide, in patients with sickle-cell disease or trait unless specialist advice supports their use. Acidosis can promote sickling.
In sickle-cell disease, lower thresholds for intervention are used because optic nerve and retinal ischemia may occur at comparatively modest IOP elevations.

Surgical treatment of hyphema

Anterior chamber washout, irrigation and aspiration of clot, or paracentesis may be needed for:

Total hyphema
Persistent uncontrolled IOP
Corneal blood staining or high risk of staining
Failure of hyphema to clear
Recurrent or organized clot
Threatened optic nerve damage
Sickle-cell disease with uncontrolled IOP

Kanski lists total hyphema and sustained severe IOP elevation as surgical indications, noting the need to prevent corneal staining, optic atrophy, synechiae, and chronic glaucoma. Kanski's Clinical Ophthalmology, 10th ed., p. 396. The AAO hyphema guidance similarly describes eye shielding, head elevation, steroids, cycloplegics, IOP control, and surgical washout in selected cases.

Management of angle-recession glaucoma

Medical treatment

First-line treatment is medical aqueous suppression:

Topical beta-blocker
Alpha-2 agonist
Topical carbonic anhydrase inhibitor
Systemic carbonic anhydrase inhibitor if necessary and not contraindicated
Prostaglandin analogue may be considered in chronic stable glaucoma, though inflammation should first be controlled

Treat active traumatic inflammation with topical corticosteroids and cycloplegics.

Laser treatment

Laser trabeculoplasty generally has limited effectiveness because the trabecular meshwork is structurally damaged. Kanski's Clinical Ophthalmology, 10th ed., p. 396.

Surgery

If medically uncontrolled, options include:

Trabeculectomy, commonly with an antimetabolite
Glaucoma drainage device
Cyclodestructive procedure in eyes with poor visual potential or refractory glaucoma

Surgical planning must account for conjunctival scarring, lens status, retinal pathology, prior trauma, and visual potential. Filtration surgery may fail more often than in primary open-angle glaucoma. The AAO angle-recession review notes a role for antimetabolite-augmented trabeculectomy, drainage devices, and cyclodestruction in selected refractory eyes.

Management of lens-related traumatic glaucoma

Control acute IOP medically.
Relieve pupillary block if present.
Treat inflammation.
Definitive management is usually lens extraction with appropriate intraocular lens planning or aphakic correction.
Address associated vitreous prolapse, zonular weakness, capsular rupture, or retinal injury.

Management of ghost-cell and hemolytic glaucoma

Topical and systemic IOP-lowering drugs as needed.
Treat associated inflammation.
Anterior chamber washout may be required in severe cases.
Pars plana vitrectomy should be considered for persistent vitreous hemorrhage that continually supplies ghost cells.
Identify and treat the source of vitreous hemorrhage, such as retinal tear, proliferative diabetic retinopathy, or trauma.

Management of foreign-body related glaucoma

Urgent localization with CT when a foreign body is suspected.
Surgical removal of the foreign body where indicated.
Management of associated globe injury, cataract, retinal detachment, endophthalmitis risk, and siderosis.
Standard IOP-lowering therapy plus definitive treatment of the underlying cause.

Follow-up

Long-term follow-up is essential after significant blunt trauma, especially with hyphema or angle recession.

Follow-up should include

IOP measurement
Gonioscopy
Optic disc examination
Visual-field assessment
OCT of retinal nerve fiber layer and ganglion cell complex where feasible
Corneal examination
Lens assessment
Retinal examination

Patients with extensive angle recession, especially more than two quadrants or over 180 degrees, should have at least annual lifelong IOP and optic nerve evaluation. Kanski's Clinical Ophthalmology, 10th ed., p. 396.

Complications

Optic nerve damage and irreversible glaucomatous visual-field loss
Corneal edema
Corneal blood staining
Peripheral anterior synechiae
Chronic angle-recession glaucoma
Traumatic cataract
Lens dislocation
Retinal tear or retinal detachment
Vitreous hemorrhage and ghost-cell glaucoma
Neovascular glaucoma
Amblyopia in children
Blind painful eye in severe neglected injury

Prognosis

Prognosis depends on:

Type and severity of the original injury
Degree and duration of IOP elevation
Presence of hyphema and rebleeding
Extent of angle recession
Lens, retinal, and optic nerve injury
Presence of open globe or intraocular foreign body
Promptness of diagnosis and treatment
Ability to maintain long-term follow-up

The final visual outcome is often determined more by associated retinal or optic nerve injury than by the hyphema itself.

Exam-oriented table: timing and mechanism

Timing after trauma	Important causes of glaucoma	Principal mechanism
Immediate to hours	Hyphema, traumatic iritis, direct trabecular injury, pigment/debris, lens dislocation	Trabecular obstruction, inflammation, pupillary block, angle closure
Days	Rebleed hyphema, persistent inflammation, pupillary block	RBC and clot obstruction, inflammatory debris, synechial changes
Weeks	Ghost-cell glaucoma, lens particle glaucoma, phacoantigenic glaucoma	Degenerated RBCs, lens material, immune inflammation
Months to years	Angle recession glaucoma, PAS, traumatic cataract, siderosis	Trabecular scarring, secondary angle closure, lens-related mechanisms, toxic trabeculopathy
Late after penetrating injury	Epithelial/fibrous downgrowth, retained foreign body	Progressive angle closure or trabecular dysfunction

Key viva points

Define angle recession.
It is a tear between the longitudinal and circular fibers of the ciliary muscle after blunt trauma, producing abnormal widening of the ciliary-body band on gonioscopy.

What is the commonest acute cause of raised IOP after blunt trauma?
Hyphema with obstruction of the trabecular meshwork by red blood cells, clot, inflammatory cells, and debris.

When does angle-recession glaucoma occur?
It may appear months, years, or decades after trauma.

Does every eye with angle recession develop glaucoma?
No. Angle recession is common after blunt trauma, but only a minority develop chronic glaucoma.

What increases the risk of glaucoma after angle recession?
Extensive recession, especially more than 180 degrees, hyphema, high initial IOP, angle pigmentation, and lens injury.

What is ghost-cell glaucoma?
Secondary open-angle glaucoma caused by rigid degenerated erythrocytes entering the anterior chamber after vitreous hemorrhage and obstructing the trabecular meshwork.

Why are carbonic anhydrase inhibitors used cautiously in sickle-cell disease?
They may worsen acidosis and promote sickling, increasing trabecular obstruction and ischemic complications.

When should gonioscopy be done?
After the acute phase, once hyphema and significant inflammation have resolved and open-globe injury has been excluded.

What is the long-term advice after traumatic hyphema?
Annual lifelong IOP, optic nerve, and visual-field surveillance, particularly if angle recession is present.

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