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What is night blindness what cause nigh blindness

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  • Night blindness, or nyctalopia, is when the eye is unable to adapt to low light conditions, such as at night. Night blindness is not a condition, but the result of an existing eye problem.
  • When the lighting is low, the eye must adapt. Although night blindness negatively affects a person's ability to see in dim light, it does not cause complete blindness. This can create problems seeing traffic signs while driving at night. It may also take longer than usual for the eye to adjust when changing from light to dark setting.
  • Night blindness is a symptom of certain underlying conditions, which can have several causes. This article will discuss the symptoms, potential causes, and treatments for night blindness.
  • Some eye problems can lead to night blindness, such as:
  1. myopia or blurred vision when looking at distant objects
  2. cataracts or clouding of the lens
  3. retinitis pigmentosa, which occurs when dark pigment builds up in your retina and creates tunnel vision
  4. Usher's syndrome, a genetic illness that affects both hearing and vision
  • Older people are at greater risk of developing cataracts. They are therefore more likely to suffer from night blindness due to cataracts than children or young adults.
  • In rare cases in the United States or other parts of the world where diets may vary, a vitamin A deficiency can also lead to night blindness.
  • Vitamin A, also called retinol, plays a role in transforming nerve impulses into pictures in the retina. The retina is an area sensitive to light behind the eye.
  • People with pancreatic insufficiencies, such as people with cystic fibrosis, have difficulty absorbing fat and are at a greater risk of having vitamin A deficiency because vitamin A is fat-soluble. This puts them at an increased risk of night blindness.
  • People who have high blood glucose levels or diabetes also have a higher risk of developing eye diseases, such as cataracts.

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