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Optic   /ˈɑptɪk/   Listen
noun
Optic  n.  
1.
The organ of sight; an eye. "The difference is as great between The optics seeing, as the object seen."
2.
An eyeglass. (Obs.)



adjective
Optical, Optic  adj.  
1.
Of, pertaining to, or using vision or sight; as, optical illusions.
Synonyms: ocular, optic, visual. "The moon, whose orb Through optic glass the Tuscan artist views."
2.
Of or pertaining to the eye; ocular; as, the optic nerves (the first pair of cranial nerves) which are distributed to the retina; the optic (or optical) axis of the eye.
3.
Relating to the science of optics or to devices designed to assist vision; as, optical works; optical equipment.
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.






Collaborative International Dictionary of English 0.48








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"Optic" Quotes from Famous Books



... If you deny the susceptibility of a temperament like his, you deny the whole operation of externals upon character and action. You deny, for example, the success of the Roman Catholic Church which relies, for its moral effects, upon such optic appeals to the senses, and upon the ease with which transitory feelings can be transmuted into axioms of conduct. Do you ...
— South Wind • Norman Douglas

... at an open page of a textbook, but not studying; not even reading; not even thinking. Nor was he lost in a reverie: his mind's eye was shut, as his physical eye might well have been, for the optic nerve, flaccid with ennui, conveyed nothing whatever of the printed page upon which the orb of vision was partially focused. Penrod was doing something very unusual and rare, something almost never accomplished except by coloured people or by a boy in school ...
— Penrod • Booth Tarkington

... sat in a deep chair in the hall, and round him were all manner of strange things whose shape and name I knew not, but little was there save old rolls of parchment to betoken a Churchman's dwelling. A great table held bottles of many shapes of glass and earthenware, and optic glasses and tools lay intermingled. I caught the gleam of much bright steel on settle and shelf—chain-mail, targe, dagger, helmet, and sword. A great warrior's complete equipment, tunic and hose of mail, shield, and helm, hung before me as I entered. ...
— The Fall Of The Grand Sarrasin • William J. Ferrar

... when I think, what certitude did I want more?—scenes being the root of the matter, especially when they bristled with proper names and noted movements; especially, above all, when they flowered at every pretext into the very optic and perspective of the stage, where the boards diverged correctly, from a central point of vision, even as the lashes from an eyelid, straight down to the footlights. Let this reminiscence remind us of how rarely in those days the ...
— A Small Boy and Others • Henry James

... of their patients, they would thwart the treatment by sitting in the parlor with the thermometer at seventy-two degrees, embroidering all kinds of fancy patterns,—some on muslin, some on satin, and some with colored worsteds on canvas,—inhaling the poisonous dyes, straining the optic nerves, counting threads and stitches, hour after hour, until utterly exhausted. I spoke to one poor victim of the fallacy of Christmas presents, and of her injuring her health in such useless employment. "What can I do?" she replied, "I must make presents and cannot afford to buy them." "Do you ...
— Eighty Years And More; Reminiscences 1815-1897 • Elizabeth Cady Stanton


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