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Retinitis pigmentosa is a rare, inherited degenerative eye disease that causes severe vision impairment. Symptoms often begin in childhood. They include decreased vision at night or in low light and loss of side vision (tunnel vision). There's no effective treatment for this condition. Wearing sunglasses may help protect remaining vision.
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Yes vitamin a is very essential for vision but in normal condon. In case if a disease proper treatment is required with that.
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