farsightedness
Webster's Unabridged Dictionary:
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Far·sight·ed·ness
n.
1. Quality of bbeing farsighted.
2. (Med.) Hypermetropia.
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farsightedness
Columbia Encyclopedia:
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farsightedness
farsightedness or hyperopia, condition in which far objects can be seen easily but there is difficulty in near vision. It is caused by a defect of refraction in which the image is focused behind the retina of the eye rather than upon it, either because the eyeball is too short or because the refractive power of the lens is too weak. Presbyopia, a similarly faulty vision, is attributable to physiological changes in the lens brought on by age. Corrective eyeglasses with convex lenses compensate for the refractive errors.
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farsightedness
IN BRIEF: n. - Seeing ahead; Abnormal condition in which vision for distant objects is better than for near objects.
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categories related to 'farsightedness'
- Defects and Disabilities - farsightedness: hyperopia
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Roget's Thesaurus
Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary Copyright © 1995 byHoughton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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Columbia Encyclopedia
The Columbia Electronic Encyclopedia, Sixth Edition Copyright © 2012, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/.
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