This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'A soft contact lens wearer developed pain and itching of the eye and showed a reticular pattern on the corneal epithelium. The cause could be – \nSelect and explain. \nA. Corneal dystrophy, B. Acanthamoeba, C. Pseudomonas, D. Virus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Reticular patter of keratitis in a contact lens wearer is seen in Acanthamoeba.\nInitially the Acanthamoeba keratitis shows typical reticular pattern due to radial keratoneuritis (Radial perineuritis), i.e. inflitrates along corneal nerves.\nDue to this, the pain is very severe (neurological due to perineuritis) which is out of proportion to the degree of inflammation.\nLater, reticular superficial keratitis advanced to ring-shaped lesion in central or paracentral region.', 'role': 'assistant'}]