This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
[{'content': 'Corneal sensation is lost in- \nSelect and explain. \nA. Herpes simplex, B. Conjunctivitis, C. Fungal infection, D. Trachoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Corneal sensations are diminshed in herpes simplex keratitis,more specifically in Disciform keratitis caused by herpes simplex virus. Reference:Comprehensive ophthalmology,AK Khurana,6th edition,page no.109', 'role': 'assistant'}]