Definitions for: Optic


[n] the organ of sight (`peeper' is an informal term for `eye')
[adj] relating to or using sight; "ocular inspection"; "an optical illusion"; "visual powers"; "visual navigation"
[adj] 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"



Webster (1913) Definition: Op"tic, n. [From Optic, a.]
1. The organ of sight; an eye.

The difference is as great between The optics
seeing, as the object seen. --Pope.

2. An eyeglass. [Obs.] --Herbert.


Op"tic, Optical Op"tic*al, a. [F. optique, Gr. ?; akin
to ? sight, ? I have seen, ? I shall see, and to ? the two
eyes, ? face, L. oculus eye. See Ocular, Eye, and cf.
Canopy, Ophthalmia.]
1. Of or pertaining to vision or sight.

The moon, whose orb Through optic glass the Tuscan
artist views. --Milton.

2. Of or pertaining to the eye; ocular; as, the optic nerves
(the first pair of cranial nerves) which are distributed
to the retina. See Illust. of Brain, and Eye.

3. Relating to the science of optics; as, optical works.

Optic angle (Opt.), the angle included between the optic
axes of the two eyes when directed to the same point; --
sometimes called binocular parallax.

Optic axis. (Opt.)
(a) A line drawn through the center of the eye
perpendicular to its anterior and posterior surfaces.
In a normal eye it is in the direction of the optic
axis that objects are most distinctly seen.
(b) The line in a doubly refracting crystal, in the
direction of which no double refraction occurs. A
uniaxial crystal has one such line, a biaxial crystal
has two.

Optical circle (Opt.), a graduated circle used for the
measurement of angles in optical experiments.

Optical square, a surveyor's instrument with reflectors for
laying off right angles.

Synonyms: eye, ocular, oculus, opthalmic, optical, peeper, visual

See Also: arteria centralis retinae, arteria ciliaris, arteria lacrimalis, canthus, central artery of the retina, choroid, choroid coat, ciliary artery, ciliary body, compound eye, conjunctiva, cornea, crystalline lens, epicanthic fold, epicanthus, eye muscle, eyeball, eyelid, face, human face, iris, lacrimal apparatus, lacrimal artery, lacrimal vein, lens, lid, musculus sphincter pupillae, nictitating membrane, ocular muscle, oculus dexter, oculus sinister, OD, orb, OS, palpebra, pupillary sphincter, receptor, retina, sclera, sclerotic coat, sense organ, sensory receptor, simple eye, third eyelid, uvea, vena lacrimalis, visual system

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