Vernal keratoconjunctivitis presenting unilaterally.

A 7-year-old boy had itching, foreign body sensation, and redness in his right eye. Unilateral cobblestone papillae and a shield ulcer were found. Topical antihistamines, mast cell stabilizers, and steroids led to marked improvement. Unilateral vernal keratoconjunctivitis should be included in the differential diagnosis of unilateral giant papillary conjunctivitis.