Vision - night blindness
Definition
Night blindness is poor vision at night or in dim light.
Alternative Names
Nyctanopia; Nyctalopia; Night blindnessConsiderations
Night blindness may cause problems with driving in the evening or at night. People with night blindness often have trouble seeing the stars on a clear night.
Causes
- Cataracts
- Retinitis pigmentosa
- Vitamin A deficiency
- Certain drugs
- Birth defects
In some cases, the eyes may simply have trouble adapting to darkness. The problem may not be due to another medical condition. However, it is often linked to myopia (nearsightedness).
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