atrophy
partial or complete wasting away of a part of the body
optic atrophy
disorder characterized by loss of optic nerve fibers. It may be inherited or acquired. Acquired causes include ischemia, optic nerve neuropathy, glaucoma, trauma, radiation, brain tumors, and multiple sclerosis. It leads to vision disturbances
cerebellar atrophy
atrophy (wasting) of the cerebellum