In a 55-year-old woman with systemic lupus erythematosus who recently had hemorrhoid surgery and now presents with right‑eye conjunctival injection and photophobia, what is the next step in managing her ocular symptoms?

Perform a comprehensive slit-lamp examination immediately to rule out infectious keratitis or scleritis before attributing symptoms to a lupus flare

The next step is urgent ophthalmologic evaluation with slit-lamp biomicroscopy to differentiate between infectious complications (particularly post-surgical bacterial keratitis or endophthalmitis) and inflammatory manifestations of SLE. 1

Why This Matters

In a patient with recent surgery (hemorrhoid surgery) presenting with conjunctival injection and photophobia, you must first exclude sight-threatening infectious causes before assuming this represents lupus activity. The temporal relationship to recent surgery raises red flags for:

• Post-operative bacterial infection (even from distant surgical sites, given potential bacteremia)
• Bacterial keratitis (photophobia is a key symptom) 2
• Infectious scleritis or episcleritis

While SLE patients do experience ocular manifestations in approximately one-third of cases 3, 4, and these often correlate with systemic disease activity 5, 6, the post-surgical timing demands infection be ruled out first.

Critical Examination Elements

The slit-lamp examination must specifically evaluate 1:

• Corneal involvement: Look for epithelial defects, infiltrates, or ulceration that would indicate keratitis
• Type of conjunctival reaction: Follicular versus papillary pattern
• Distribution: Unilateral (more concerning for infection) versus bilateral
• Anterior chamber: Check for cells/flare indicating uveitis
• Scleral involvement: Assess for nodular scleritis or diffuse inflammation

Additional key findings to document 1:

• Visual acuity measurement
• Preauricular lymphadenopathy (suggests viral or bacterial infection)
• Character and amount of discharge
• Presence of pain (severe pain suggests keratitis or scleritis)

The Diagnostic Dilemma

Common pitfall: Attributing all new symptoms to the underlying autoimmune disease without excluding infection, especially in the post-operative period. This is particularly dangerous because:

1. SLE patients may have altered immune responses that mask typical infectious presentations 3
2. Lupus retinopathy can mimic infectious causes like tuberculosis, creating diagnostic confusion 7
3. Photophobia specifically suggests corneal or uveal involvement, not simple conjunctivitis 2

If Infection is Ruled Out

Only after excluding infectious etiologies should you consider SLE-related causes 1:

• Keratoconjunctivitis sicca (most common SLE ocular manifestation) 3, 4, 8
• Episcleritis/scleritis (can present with pain, redness, photophobia) 3
• Retinal vasculitis (though typically presents with vision loss rather than isolated photophobia) 9

Immediate Management Algorithm

1. Urgent ophthalmology referral for slit-lamp examination
2. If bacterial keratitis suspected: Obtain corneal cultures before starting fortified topical antibiotics 2
3. If scleritis/episcleritis confirmed: Assess for systemic SLE activity and consider systemic immunosuppression 3
4. If dry eye/sicca: Initiate lubricating drops; reserve immunosuppression for severe cases 3

Do not empirically start corticosteroids until infection is definitively excluded, as this could worsen bacterial keratitis and lead to corneal perforation 2. The bacterial keratitis guideline explicitly warns that patients on topical corticosteroids at presentation should have their regimen reduced or eliminated until infection is controlled 2.