<prompt> All of the following conditions exhibit cherry red spot on retina, EXCEPT:CRAOTay Sachs diseaseNiemann picks diseaseCentral retinal vein occlusion  <response>: Conditions diseases displaying a cherry-red macular spot: Central retinal aery occlusion Commotio retinae Berlins edema GM1 gangliosidosis GM2 gangliosidosis Tay-Sachs and Sandhoff type Sialidosis Niemann-Pick disease types A to D not E and F; ring may be diffuse and indistinct Farber lipogranulomatosis Metachromatic leukodystrophy Neuronal ceroid lipofuscinosis, late infantile form bulls-eye maculopathy, not true cherry-red spot Ref: Ropper A.H., Samuels M.A. 2009. Chapter 37. Inherited Metabolic Diseases of the Nervous System. In A.H. Ropper, M.A. Samuels Eds, Adams and Victors Principles of Neurology, 9e. 