Optic

adj. of vision; of the eye; of or pertaining to optical instrument

n. eye, organ used for seeing; any lens in an optical device

Optics ( appearance or look in Ancient Greek) is a branch of physics that describes the behavior and properties of light and the interaction of light with matter. Optics explains optical phenomena. The field of optics usually describes the behavior of visible, infrared, and ultraviolet light; however because light is an electromagnetic wave, analogous phenomena occur in X-rays, microwaves, radio waves, and other forms of electromagnetic radiation. Optics can thus be regarded as a sub-field of electromagnetism. Some optical phenomena depend on the quantum nature of light relating some areas of optics to quantum mechanics. In practice, the vast majority of optical phenomena can be accounted for using the electromagnetic description of light, as described by Maxwell's Equations.
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Optic /op·tic/ ocular. op·tic or op·ti·cal adj. 1. Of or relating to the eye or vision. 2. Of or relating to the science of optics or optical [more]Optic - Community and Resources

Noun
1. the organ of sight
(synonym) eye, oculus
(hypernym) sense organ, sensory receptor, receptor
(hyponym) naked eye
(part-holonym) visual system
(part-meronym) choroid, choroid coat
(classification) colloquialism
Adjective
1. 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"
(synonym) ocular, optical, opthalmic
(pertainym) eye, oculus
2. relating to or using sight; "ocular inspection"; "an optical illusion"; "visual powers"; "visual navigation"
(synonym) ocular, optical, visual
(pertainym) sight, vision, visual sense, visual modality

(a.)
The organ of sight; an eye.
  

(a.)
An eyeglass.
  

(a.)
Alt. of Optical