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What is Examination of the fundus shows Cherry red spot in all of the following conditions, EXCEPT: and explain in detail?
Cherry red spot is an ophthalmoscopic finding caused by the abnormal accumulation of products like gangliosides in the ganglion layer of the retina. The absence of ganglion cells in the area gives rise to a cherry-red spot surrounded by white cells filled with storage material. As the cells sta to die, optic atrophy becomes visibly apparent. Cherry red spot is seen in: Berlin's oedema Gaucher's disease Tay sach's disease Neimann pick's disease Central retinal aery occlusion Ref: Ophthalmology By A.K Khurana, 4th Edition, Page 257, 478; Harrison's Principles of Internal Medicine By Robe J. Hopkin, Gregory A. Grabowski, Chapter 355, Page 2452