The Cleveland Clinic

Night blindness

What is Night Blindness?

Night blindness (nyctalopia) is the inability to see well at night or in poor light. It is not a disorder in itself, but rather a symptom of an underlying disorder or problem, especially untreated nearsightedness.

What Causes Night Blindness?

Night blindness is due to a disorder of the cells in the retina that are responsible for vision in dim light. It has many causes, including:

  • Nearsightedness
  • Glaucoma medications that work by constricting the pupil
  • Cataracts
  • Retinitis pigmentosa
  • Vitamin A deficiency
In order to determine what is causing night blindness, the eye doctor will perform a thorough eye exam and may order any of a number of specialized exams .

How Is Night Blindness Treated?


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