This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Optics and Errors of Refraction, Subject name: Ophthalmology
[{'content': 'Crowding phenomenon is seen in: \nSelect and explain. \nA. Hypermetropia, B. Amblyopia, C. Strabismus, D. Retinitis pigmentosa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Crowding Phenomenon - patient is able to identify a Snellen chant character with the amblyopic eye when The character is presented in isolation. Crowding phenomenon seen in Amblyopia. Amblyopia - loss of vision in a child (<8yr) Lazy eye syndrome M/c/c of amblyopia = squint Best treatment of Amblyopia - occlusion of good eye - forces the amblyopic eye to see more and thereby develop better vision. Occlusion therapy works only when the development is plastic (i.e. during childhood) Vitamin used for treating Toxic Amblyopia - Hydroxycobalamine (misnomer - Toxic Optic Neuropathy is better used term)', 'role': 'assistant'}]