This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy, Development and clinical examination, Subject name: Ophthalmology
[{'content': 'Sudden painful loss of vision seen in \nSelect and explain. \nA. Angle closure glaucoma, B. Central retinal aery occlusion, C. Acute uveitis, D. Endopthalmitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sudden painful loss of vision : Acute congestive glaucoma Acute iridocyclitis Chemical injuries to the eyeball Mechanical injuries to the eyeball Reference : AK KHURANA COMPREHENSIVE OPHTHALMOLOGY, Edition 4, Page-462', 'role': 'assistant'}]