Diagnosis: Unilateral Ptosis (Left Eye) — Most Likely Traumatic/Mechanical Etiology

Clinical Findings from the Images

Differential Diagnosis

1. Traumatic / Mechanical Ptosis — blunt orbital trauma causing lid edema and swelling, which mechanically weighs down the lid. The visible skin abrasion and lower lid swelling support recent trauma. "Enlargement or deformation of the eyelid from infection, tumor, trauma, or inflammation also results in ptosis on a purely mechanical basis." — Harrison's Principles of Internal Medicine 22E, p. 277
2. Aponeurotic Ptosis from Trauma — blunt trauma to the orbit can cause dehiscence or stretching of the levator aponeurosis. "Aponeurotic ptosis is also a common sequela of eyelid swelling from infection or blunt trauma to the orbit." — Harrison's, p. 277

Key Examination Steps

• Pupillary assessment — miosis → Horner's; mydriasis + ophthalmoplegia → CN III palsy
• Extraocular movements — any limitation?
• Levator function — measure upper lid excursion (>15 mm = normal)
• Orbital imaging (CT) — if trauma suspected, rule out orbital wall fracture (blowout fracture) given periorbital trauma signs

Bottom Line

Management of Post-Traumatic Ptosis

Phase 1 — Immediate / Acute (First 24–72 hours)

1. Pupil exam — check for miosis (Horner's) or mydriasis + ophthalmoplegia (CN III palsy); either requires urgent neuroimaging
2. CT orbit — mandatory given visible periorbital trauma; rule out:
   • Orbital blowout fracture
   • Retrobulbar haematoma
   • Foreign body
3. Visual acuity — document baseline
4. Wound care — the lateral canthal abrasion/laceration should be cleaned, irrigated, and dressed; suture if gaping
5. Conservative measures:
   • Cold compresses (ice pack) for 20 min every 1–2 hrs in first 48 hrs → reduces oedema
   • Elevate head of bed
   • Analgesics (NSAIDs / paracetamol)
   • Topical antibiotic ointment to skin wound

Phase 2 — Observation Period (2–6 weeks)

• Do NOT rush to surgical correction
• Monitor weekly: measure Margin-Reflex Distance (MRD) — distance from corneal light reflex to upper lid margin (normal: 3–4.5 mm)
• Measure levator function (lid excursion from downgaze to upgaze; normal >12 mm) — "Levator shortening procedures potentially have a good prognosis with normal function." — Cummings Otolaryngology, p. 529
• If ptosis persists beyond 4–6 weeks → likely aponeurotic injury, not purely mechanical

Phase 3 — Definitive Surgical Management (if ptosis persists >3–6 months)

"Aponeurotic ptosis is a common sequela of eyelid swelling from blunt trauma to the orbit... A high lid crease may suggest disinsertion of the levator aponeurosis, the anatomic etiology for acquired ptosis." — Cummings Otolaryngology / Harrison's

Referral

• Ophthalmology — urgent if: visual acuity reduced, afferent pupillary defect, CN palsy, globe injury
• Oculoplastic surgery / Ophthalmology — elective if ptosis persists after oedema resolves, for definitive surgical correction
• Neurology / Neurosurgery — if neurogenic cause identified on imaging

Summary Algorithm

Blunt periorbital trauma + unilateral ptosis
        ↓
CT orbit → fracture? → ortho/plastics consult
        ↓
Pupil exam → abnormal → neuroimaging urgently
        ↓
Wound care + cold compress + analgesia
        ↓
Observe 4–6 weeks → ptosis resolved? → reassure
        ↓
Persistent ptosis → measure MRD + levator function
        ↓
Oculoplastic referral → levator repair / frontalis sling

Revised Diagnosis & Management

Revised Diagnosis

Preseptal (Periorbital) Cellulitis — Most Likely

Management

Step 1 — Immediate Assessment

• Visual acuity both eyes
• Pupillary reactions (APD = optic nerve involvement → emergency)
• Extraocular movements — restriction/pain on movement = orbital cellulitis, escalate immediately
• Proptosis — use Hertel exophthalmometer or simple lateral inspection
• Temperature / systemic signs — fever, toxicity
• Skin wound — size, depth, signs of abscess/fluctuance

Step 2 — Investigations

• FBC — leukocytosis confirms infection
• CRP / ESR
• Blood cultures — if febrile or systemically unwell
• CT orbit with contrast — mandatory if:
  • Any restriction of eye movements
  • Proptosis
  • Visual deterioration
  • No improvement on antibiotics within 24–48 hrs
  • Suspicion of abscess

Step 3 — Antibiotics

• Oral co-amoxiclav (amoxicillin-clavulanate) 625 mg TDS × 7–10 days
• Alternative: oral cefalexin + metronidazole, or clindamycin (if penicillin allergy)
• Cover for MRSA if skin breach is prominent: add trimethoprim-sulfamethoxazole (co-trimoxazole)

• Admit → IV co-amoxiclav or IV cefazolin
• Upgrade to IV vancomycin if MRSA suspected

• Admit + IV broad-spectrum antibiotics (e.g., IV piperacillin-tazobactam)
• Urgent ophthalmology + ENT review
• Surgical drainage if abscess identified on CT

Step 4 — Local Wound Care

• Clean and dress the lateral canthal abrasion (portal of entry)
• Topical antibiotic ointment (e.g., chloramphenicol or fusidic acid) to wound and conjunctiva
• Warm compresses to eyelid 3–4× daily → promotes drainage, reduces swelling

Step 5 — Follow-Up

• Review at 24–48 hours — if swelling worsening, temperature rising, or vision changes → admit and CT scan
• Ptosis will resolve as periorbital oedema subsides with treatment — no surgical intervention needed for the lid at this stage

Red Flags Requiring Emergency Escalation

• Pain on eye movement
• Proptosis
• Reduced/blurred vision
• Afferent pupillary defect
• Ophthalmoplegia
• High fever / altered mental status → cavernous sinus thrombosis

"Except for preseptal cellulitis, admission, IV antibiotics, and surgical debridement/drainage are required. Afferent pupillary defect indicates optic nerve compression and requires urgent surgery." — K.J. Lee's Essential Otolaryngology, p. 541