I. noun — [ mass noun] 1.
[Medicine] partial or total blindness without visible change in the eye, typically due to disease of the optic nerve, spinal cord, or brain.
II. derivatives amaurotic /ˌamɔːˈrɒtɪk / adjective
– origin mid 17th cent.: from Greek amaurōsis, from amauroun ‘darken’, from amauros ‘dim’.