optic

(noun) the organ of sight. Synonyms: eye, oculus.

(adj) of or relating to or resembling the eye. Synonyms: ocular, optical, opthalmic. Examples: "Ocular muscles." "An ocular organ." "Ocular diseases." "The optic (or optical) axis of the eye." "An ocular spot is a pigmented organ or part believed to be sensitive to light."

(adj) relating to or using sight. Synonyms: ocular, optical, visual. Examples: "Ocular inspection." "An optical illusion." "Visual powers." "Visual navigation."