optic -
of or relating to or resembling the eye; "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"
sense organ,
sensory receptor,
receptor an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation
colloquialism a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
naked eye the eye unaided by any optical instrument that alters the power of vision or alters the apparent size or distance of objects; "it is not safe to look directly at the sun with the naked eye"
peeper an animal that makes short high-pitched sounds
compound eye in insects and some crustaceans: composed of many light-sensitive elements each forming a portion of an image
choroid,
choroid coat a highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye
ciliary body the part of the tunic of the eye between the choroid coat and the iris; "the ciliary body produces aqueous humor"
eyelid,
palpebra,
lid either of two folds of skin that can be moved to cover or open the eye; "his lids would stay open no longer"
canthus either of the corners of the eye where the upper and lower eyelids meet
epicanthic fold,
epicanthus a vertical fold of skin over the nasal canthus; normal for Mongolian peoples; sometimes occurs in Down's syndrome
arteria lacrimalis,
lacrimal artery an artery that originates from the ophthalmic artery and supplies the lacrimal gland and rectal eye muscles and the upper eyelid and the forehead
