Causes of painful vision loss
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Causes of Painful Vision Loss
Painful vision loss is an important clinical distinction from painless vision loss, as pain significantly narrows the differential and often signals urgency. The key framework is onset (acute vs. chronic) and laterality (monocular vs. binocular).
Acute Monocular Painful Vision Loss
| Condition | Key Features |
|---|---|
| Acute Angle-Closure Glaucoma | Most classic cause; sudden severe eye/frontal pain, blurred vision, nausea/vomiting, halos; fixed mid-dilated pupil, hazy cornea, rock-hard globe; IOP can exceed 60–80 mmHg |
| Optic Neuritis | Retro-orbital pain (worsens with eye movement in ~92% of cases); vision loss over hours–days; common in ages 18–45; strongly associated with multiple sclerosis; relative afferent pupillary defect (RAPD), loss of color vision |
| Corneal Lesions (abrasion, ulcer, keratitis) | Sharp/foreign body pain, photophobia, tearing; may include hypopyon in bacterial keratitis (Pseudomonas keratitis is a medical emergency due to rapid progression) |
| Uveitis / Iritis | Aching pain, photophobia, ciliary flush, posterior synechiae; may cause significant vision loss if severe or chronic |
| Endophthalmitis | Progressively increasing eye pain with rapidly decreasing vision; hypopyon in anterior chamber; post-surgical or post-traumatic context |
| Corneal Hydrops | Seen in keratoconus; acute stromal swelling, severe pain and sudden visual blurring |
Transient Painful Vision Loss
| Condition | Features |
|---|---|
| Migraine | Bilateral; visual aura (scintillating scotoma), headache, photophobia/phonophobia |
| Dry Eye Syndrome | Burning/stinging pain; worse with prolonged use; transient blurring |
| Superficial Punctate Keratopathy | Foreign body sensation; multiple corneal epithelial defects |
Acute Binocular Painful Vision Loss
| Condition | Features |
|---|---|
| Migraine | Most common; preceded by aura, throbbing headache |
| Pituitary Apoplexy | Sudden severe headache, bitemporal hemianopsia, ophthalmoplegia, endocrine emergency |
| Papilledema | May cause headache (raised ICP); visual obscurations; bilateral disc edema |
| Dry Eye / SPK | As above |
Chronic Painful Vision Loss
Relatively uncommon — most chronic vision loss is painless. Exceptions:
- Dry eye syndrome — chronic burning, sandy sensation, fluctuating blurry vision
- Superficial punctate keratopathy — persistent epithelial disruption
Special / High-Risk Causes to Not Miss
| Condition | Why Critical |
|---|---|
| Acute Angle-Closure Glaucoma | Irreversible optic nerve damage without emergent treatment (IOP reduction + laser iridotomy) |
| Giant Cell Arteritis (Temporal Arteritis) | Jaw claudication, tender temporal artery, ESR >50; causes ischemic optic neuropathy with risk of bilateral permanent blindness — requires urgent high-dose steroids |
| Endophthalmitis | Ocular emergency; intravitreal antibiotics required urgently |
| Optic Neuritis | First manifestation of MS in ~30% of cases; IV methylprednisolone speeds recovery |
| Carotid-Cavernous Fistula | Post-traumatic; pulsatile proptosis, chemosis, bruit; may cause ischemic vision loss |
Quick Reference: Pain = vs. Painless
- Painful → angle-closure glaucoma, optic neuritis, uveitis, keratitis, endophthalmitis, corneal abrasion/ulcer, migraine, pituitary apoplexy
- Painless → retinal artery/vein occlusion, ischemic optic neuropathy (usually), vitreous hemorrhage, retinal detachment, CRVO, CRAO, cataract, open-angle glaucoma, amaurosis fugax
Sources: Tintinalli's Emergency Medicine (pp. 1595–1597); The Wills Eye Manual (pp. 34–35, 697–698); Robbins Pathologic Basis of Disease
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