long-sightedness

views updated May 14 2018

long-sightedness (hyperopia) Defect of vision that causes distant objects to be seen more clearly than nearby ones. In a long-sighted person, the focusing distance of the eyeball is too short and, as a result, light rays entering the eye strike the retina before they can be properly focused. Long-sightedness is corrected by convex lenses. See also myopia

World Encyclopedia

long-sightedness

views updated Jun 11 2018

long-sightedness (long-syt-id-nis) n. see hypermetropia.

A Dictionary of Nursing

long-sightedness

views updated Jun 08 2018

long-sightedness See hypermetropia.

A Dictionary of Biology

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long-sightedness

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