scotoma /-ōmˈə/ noun (pl scotōˈmata or scotōˈmas) (Gr skotōma dizziness; medicine)

An area of abnormal or absent vision within the visual field, a blind spot due to disease of the retina or optic nerve

scotōˈmatous adjective

scotoˈmeter noun

An instrument for identifying defects in the visual field

scotōˈmia and scotˈomy noun (obsolete)

Scotoma, in its obsolete sense of dizziness accompanied by dimness of vision

scotōpˈia noun

Vision in dim light

scotopic /-opˈ/ adjective