night blindness
Sign in to saveNyctalopia (; ), also called night blindness, is a condition making it difficult or impossible to see in relatively low light. It is a symptom of several eye diseases. Night blindness may exist from birth, or be caused by injury or malnutrition (for example, vitamin A deficiency). It can be described as insufficient adaptation to darkness.
AI overview
Night blindness is a condition that makes it difficult or impossible to see in low light, and it can result from various eye diseases, injuries, malnutrition, or be present from birth. It matters because it significantly impacts a person's ability to function in dim environments and can sometimes signal an underlying health problem that may need treatment.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Medical condition.name
- Nyctalopia
- Medical condition.image
- 260px
- Medical condition.caption
- Effect of night blindness. Left: normal night vision. Right: night-blind vision.
- Medical condition.synonym
- Night blindness
via Wikipedia infobox
Research
2,833 papersvia PubMed
Article
6 sectionsContents
- Causes
- Treatment
- Historical usage
- Nyctalopia in animals
- References
- External links
Nyctalopia (; ), also called night blindness, is a condition making it difficult or impossible to see in relatively low light. It is a symptom of several eye diseases. Night blindness may exist from birth, or be caused by injury or malnutrition (for example, vitamin A deficiency). It can be described as insufficient adaptation to darkness.
The most common cause of nyctalopia is retinitis pigmentosa, a disorder in which the rod cells in the retina gradually lose their ability to respond to the light. Patients with this genetic condition have progressive nyctalopia and, eventually, their daytime vision may also be affected. In X-linked congenital stationary night blindness, from birth the rods either do not work at all, or work very little, but the condition does not get worse.