Retinitis pigmentosa (RP) is an inherited, degenerative eye disease that causes severe vision impairment and often blindness.Sufferers will experience one or more of the following symptoms: Night blindness or nyctalopia; Tunnel vis...ion (no peripheral vision); Peripheral vision (no central vision); Latticework vision; Aversion to glare; Slow adjustment from dark to light environments and vice versa; Blurring of vision; Poor color separation; and Extreme tiredness. The progress of RP is not consistent. Some people will exhibit symptoms from infancy, others may not notice symptoms until later in life.Generally, the later the onset, the more rapid is the deterioration in sight. Also notice that people who do not have RP have 90 degree peripheral vision, while some people that have RP have less than 90 degree. A form of retinal dystrophy, RP is caused by abnormalities of the photoreceptors (rods and cones) or the retinal pigment epithelium (RPE) of the retina leading to progressive sight loss. Affected individuals may experience defective light to dark, dark to light adaptation or nyctalopia (night blindness), as the result of the degeneration of the peripheral visual field (known as tunnel vision). Sometimes, central vision is lost first causing the person to look sidelong at objects. Writen By ;- Tajaul Mushtaq.
Posted on: Fri, 19 Jul 2013 09:18:52 +0000
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