retinitis pigmentosa

/pig'men toh"seuh, -meuhn-/, Ophthalm.
degeneration of the retina manifested by night blindness and gradual loss of peripheral vision, eventually resulting in tunnel vision or total blindness.
[1860-65; < NL: pigmentary retinitis. See PIGMENT, -OSE1]

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 group of hereditary eye (eye, human) 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 (rod)—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.

      In most cases, the course of disease is very slow, and progression to total blindness is uncommon. There are several hereditary patterns for retinitis pigmentosa, and multiple genetic (genetics, human) defects responsible for the various forms of disease have been isolated. Treatment is largely supportive and aimed at optimizing remaining vision. When retinitis pigmentosa is associated with congenital hearing loss, the condition is called Usher syndrome, which is the most common cause of combined blindness and deafness in the United States.

Daniel M. Albert David M. Gamm
 

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Universalium. 2010.

Look at other dictionaries:

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  • retinitis pigmentosa — f. oftalm. Proceso degenerativo de la retina de carácter hereditario. Se caracteriza por una pigmentación anormal de la retina, pérdida de la agudeza visual, atrofia de la papila óptica y reducción del campo visual. Suele conducir a la ceguera.… …   Diccionario médico

  • retinitis pigmentosa — retinitis pigmentosa. См. пигментная дистрофия сетчатки. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • retinitis pigmentosa — [pig men tō′sə] n. an inherited, incurable eye disease that gradually destroys the retina and optic nerve, slowly reducing the field of vision until total blindness occurs …   English World dictionary

  • Retinitis pigmentosa — DiseaseDisorder infobox Name = Retinitis pigmentosa ICD10 = ICD10|H|35|5|h|30 ICD9 = ICD9|362.74 OMIM = 268000 MeshID = D012174Retinitis pigmentosa (RP) is a group of genetic eye conditions. In the progression of symptoms for RP, night blindness… …   Wikipedia

  • Retinitis Pigmentosa — Klassifikation nach ICD 10 H35.5 Hereditäre Netzhautdystrophie …   Deutsch Wikipedia

  • retinitis pigmentosa — Eng. Retinitis pigmentosa Ver retinitis pigmentaria …   Diccionario de oftalmología

  • retinitis pigmentosa — a hereditary condition characterized by progressive degeneration of the retina due to malfunctioning of the retinal pigment epithelium. It starts in childhood with night blindness and limited peripheral vision and may progress to complete loss of …   The new mediacal dictionary

  • retinitis pigmentosa — retinitis pig·men·to·sa .pig mən tō sə, (.)men , zə n any of several hereditary progressive degenerative diseases of the eye marked by night blindness in the early stages, atrophy and pigment changes in the retina, constriction of the visual… …   Medical dictionary

  • retinitis pigmentosa — [ˌpɪgmɛn təʊsə] noun Medicine a hereditary eye disease characterized by black pigmentation and gradual degeneration of the retina. Origin C19: pigmentosa, feminine of L. pigmentosus, from pigmentum pigment …   English new terms dictionary

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