A possible complication of Staph marginal keratitis is scarring of the cornea.

• A. Corneal scarring
• B. Retinal detachment
• C. Optic neuropathy
• D. Glaucoma

Answer: (A)

Staph marginal keratitis can produce inflammation that involves the peripheral cornea, often as a reaction to lid-margin disease. When inflammation affects the corneal stroma, it can heal with scarring, especially after repeated episodes or if the inflammation is persistent. So corneal scarring is a plausible complication because the tissue involved is the cornea itself and scarring directly affects corneal clarity.

The other conditions listed do not arise from this corneal surface disease: retinal detachment, optic neuropathy, and glaucoma involve the back of the eye or the optic nerve and anterior chamber dynamics, not the peripheral cornea, so they aren’t typical complications of Staph marginal keratitis.