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Optical device
Answer for the clue "Optical device ", 7 letters:
bifocal
Alternative clues for the word bifocal
Word definitions for bifocal in dictionaries
Wiktionary
Word definitions in Wiktionary
a. 1 (context optics English) Having two focal lengths 2 (context of a correcting lens English) Divided into two parts, one of which corrects for distance vision and the other for near vision
Wikipedia
Word definitions in Wikipedia
Bifocal may refer to: Bifocals , eyeglasses whose corrective lenses each contain regions with two distinct optical powers Fundamental matrix (computer vision) , sometimes referred to as "bifocal tensor"
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Bifocal \Bi"fo`cal\, n. [Pref. bi-+ focal.] a bifocal lens.
WordNet
Word definitions in WordNet
adj. having two foci; "bifocal eyeglasses"
Usage examples of bifocal.
A frowning middle-aged woman with conspicuously rouged cheeks, chunky bifocal glasses.
Her thinning blue-gray hair was set neatly above a smooth, plump face, broken only by the bifocal spectacles perched low on the bridge of her potato nose.