mɛnˈtoʊBased on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source
retinitis pigmentosa (ˌpɪɡmənˈtəʊsə) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| 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] | |
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
| a scrap or morsel of food left at a meal. |
| a stew of meat, vegetables, potatoes, etc. |
retinitis pigmentosa retinitis pig·men·to·sa (pĭg'mən-tō'sə, -měn-)
n.
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.
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
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. |
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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.
Learn more about retinitis pigmentosa with a free trial on Britannica.com.
Cite This Source
