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Retinitis Pigmentosa Overview of Retinitis Pigmentosa Retinitis pigmentosa is also known as night blindness. There is slow degeneration of the cells which form the retina. The retina is the layer of the eye that converts light impulses into neurological signals that are transported to the visual areas of the brain. With progression of the disease, the peripheral vision is lost. The person gradually develops tunnel vision. There may be a family history of this type of disorder. Causes of Retinitis Pigmentosa Retinitis pigmentosa is sometimes an inherited disorder. In these circumstances, it may be apparent in childhood. Other instances of retinitis pigmentosa do not have a known cause. Signs and Symptoms of Retinitis Pigmentosa The earliest symptoms are difficulty seeing at night or in impaired lighting. Eventually, loss of peripheral vision occurs, leading to tunnel vision. advertisement Find more information

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