He lost sight in one eye in an accident.
I view distant scenery with a monocular.
simple eye; ocellus
Zoological term for a simple eye in arthropods and other invertebrates, distinct from compound eyes (複眼).
See also: 複眼
Insects have both compound eyes and simple eyes on their heads.
cyclopia
narrow-minded; short-sighted
From 単 (single) + 眼 (eye). The zoological sense is a direct translation of the Western scientific term 'simple eye' or 'ocellus'.