Night blindness also known as nyctalopia. The term night blindness implies that a person can’t see at night, it isn’t the case. A person diagnosed with night blindness experience has poor vision at night or dimly lit conditions.
Night blindness is not a disease in itself but a symptom of any disorder affecting the retina that allows a person to see in dim light.
Some possible causes:
- Glaucoma medication – that close the pupil
- Retinitis pigmentosa
- Vitamin a deficiency
- Keratoconus- a progressive eye disease in which the normally round cornea thins and begins to bulge into a cone-like shape.
- Usher syndrome
- Cystic fibrosis or other pancreatic insufficiency
Treatment is depending on the cause of someone’s night blindness the treatment may be a new prescription for glasses, medication or surgery.