Which of the following is NOT listed as an ocular side effect of prostaglandin analogs?

• A. Conjunctival hyperemia
• B. Stinging with instillation
• C. Eyelash growth
• D. Keratitis

Answer: (D)

Prostaglandin analogs used for glaucoma typically cause local ocular surface effects. Among the common ones, conjunctival hyperemia occurs from vasodilation of the conjunctival vessels, and stinging with instillation is a frequent, quickly diminishing irritation after drop application. Eyelash growth is another well-known effect, since these drugs can stimulate hair follicles and prolong the growth phase of lashes. Keratitis, however, is not a standard or commonly listed ocular side effect of these medications. If corneal inflammation or infection does occur, it would be evaluated as a separate issue rather than a typical drug-related adverse effect.