retinitis pigmentosa

retinitis pigmentosa

[pig-men-toh-suh, -muhn-]
noun Ophthalmology.
degeneration of the retina manifested by night blindness and gradual loss of peripheral vision, eventually resulting in tunnel vision or total blindness.

1860–65; < Neo-Latin: pigmentary retinitis. See pigment, -ose1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
retinitis pigmentosa (ˌpɪɡmənˈtəʊsə)
a degenerative hereditary disease of the human eye, characterized by pigmentary changes in the retina, night blindness, and eventual loss of vision
[C19: pigmentosa, feminine of Latin pigmentosus]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

retinitis pigmentosa retinitis pig·men·to·sa (pĭg'mən-tō'sə, -měn-)
A hereditary degenerative disease of the retina, producing conditions such as night blindness, pigmentation changes in the retina, narrowing of the visual field, and the eventual loss of vision. Also called pigmentary retinopathy, tapetoretinal retinopathy.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
retinitis pigmentosa   (rět'n-ī'tĭs pĭg'měn-tō'sə)  Pronunciation Key 
A hereditary degenerative disease of the retina, characterized by difficulty seeing at night, pigmentary changes within the retina, and eventual loss of vision.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica

retinitis pigmentosa

group of hereditary eye diseases in which progressive degeneration of the retina leads to severe impairment of vision. In the usual course of disease, the light-sensitive structures called rods-which are the visual receptors used in dim light-are destroyed early on, causing night blindness in youth. Over time, further atrophy of the retina and changes in the layer of supporting cells known as the pigment epithelium occur. Commonly the field of vision becomes constricted until the affected person sees objects as if looking through a tunnel.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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