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Definition of Trifocal
1. Adjective. (optics) Of or pertaining to corrective lenses that have three different powers per eye. ¹
¹ Source: wiktionary.com
Definition of Trifocal
1. a type of lens [n -S] - See also: lens
Medical Definition of Trifocal
1. Having three foci. See: trifocal lens. (05 Mar 2000)
Lexicographical Neighbors of Trifocal
Literary usage of Trifocal
Below you will find example usage of this term as found in modern and/or classical literature:
1. Report of the Annual Meeting (1876)
"Папе trifocal cubics exhibit (in their* point-equations) cusps at infinity, but
have not coincident asymptotes. 9. The other two groups of spherical cubics ..."
2. The Well-Being of Video Display Terminal Users: An Exploratory Study by Mark S Gottlieb, Steven L Sauter, Vernon M Dodson, Kathryn M Rohrer (1999)
"However, the proportion of bifocal/trifocal wearers reporting strains is also in
excess of the proportion of individuals without corrective eyewear ..."
3. The Cornerstone of Development: Integrating Environmental, Social, and by Jamie Schnurr, Susan Holtz (1998)
"The present conceptual framework: trifocal vision One of the main obstacles to
developing a common conceptual framework for ecological, economic, ..."
4. The Medical and Surgical Reporter (1890)
"(trifocal.) ing in the far-vision lens and secured therein by suitable adhesive
substance substantially as set." To any one who has followed this article it ..."
5. Wilson's Photographic Magazine (1914)
"UNIFORMLY CURVED trifocal LENS HENRY BOLDE, of New York, assignor to the Meyrowitz
Manufacturing Company, has patented a trifocal lens in which two minor ..."
6. Report by British Association for the Advancement of Science (1876)
"... although, as in cubics of the third order, they are not coextensive. There are
three species only in piano of trifocal cubics (complex, ..."
Other Resources:
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