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Optical   /ˈɑptɪkəl/   Listen
Optical

adjective
1.
Of or relating to or involving light or optics.
2.
Relating to or using sight.  Synonyms: ocular, optic, visual.  "An optical illusion" , "Visual powers" , "Visual navigation"
3.
Of or relating to or resembling the eye.  Synonyms: ocular, opthalmic, optic.  "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"



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"Optical" Quotes from Famous Books



... fascination about the idea that I can't understand. Now I do not believe we saw a man walking on fog the other night, and yet I can't resist the desire to hunt the matter out and discover what sort of an optical illusion it was. I am not at all certain the man who took a shot at us was the one we saw across the ravine, either. I had an experience once when I was about nine years old, that, in a way, tainted my mind with the ghost idea, and perhaps that is ...
— Pocket Island - A Story of Country Life in New England • Charles Clark Munn

... larger than black ones. A white square looks larger than a black one. It is said that cattle buyers who are sometimes compelled to guess at the weight of animals have learned to discount their estimate on white animals and increase it on black ones to make allowances for the optical illusion. ...
— Applied Psychology: Making Your Own World • Warren Hilton

... crevice in its ragged but perpendicular sides. At its feet is a cleft about 60 feet long, 16 wide, and 18 deep, full of water at a temperature of 90 degrees. This has an absolute transparency of a singular kind, and perpetrates wonderful optical illusions. Every thing put into it is transformed. The rocks, broken timber, and old cocoa nuts which lie below it, are a frosted blue; the dusky skins of natives are changed to alabaster; and as my companion, in a light ...
— The Hawaiian Archipelago • Isabella L. Bird

... Time, Place or Modesty. You complained also, that a Starer is not usually a Person to be convinced by Reason of the Thing, nor so easily rebuked, as to amend by Admonitions. I thought therefore fit to acquaint you with a convenient Mechanical Way, which may easily prevent or correct Staring, by an Optical Contrivance of new Perspective-Glasses, short and commodious like Opera Glasses, fit for short-sighted People as well as others, these Glasses making the Objects appear, either as they are seen by the ...
— The Spectator, Volumes 1, 2 and 3 - With Translations and Index for the Series • Joseph Addison and Richard Steele

... Courtiers there present were invisible. For indeed it is well said, 'in every object there is inexhaustible meaning; the eye sees in it what the eye brings means of seeing.' To Newton and to Newton's Dog Diamond, what a different pair of Universes; while the painting on the optical retina of both was, most likely, the same! Let the Reader here, in this sick-room of Louis, endeavour to look with ...
— The French Revolution • Thomas Carlyle


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