eye retina in tay-sachs disease, 3d with so-called cherry-red spot

taysachs disease tsd retina autosomal recessive disorder cherry red spot eye genetic gm2 gangliosidosis hexosaminidase deficiency lipid storage lysosomal macula medical metabolic neurology ocular ophthalmology pathology rare science sphingolipidosis 3d illustration ophthalmoscope hexa betahexosaminidase human molecular enzyme congenital demyelination diagram gene mutation ganglioside infant inherited lysosome ashkenazi jew person