Most common cause of infectious keratitis in a contact lens user: (A) Acanthamoeba, (B) Pneumococcus, (C) Pseudomonas, (D) Staph
Answer is C. Most common cause of infectious keratitis in a contact lens user is pseudomonas Commonest causative organism associated with keratitis - pneumococcus Hypopyon ulcer / ulcus serpens - pneumococcus acanthamoeba : attacks contact lens that are washed with water.