Night blindness (nyctalopia) refers to difficulty seeing in the dark or poor lighting. It’s not a disease but a symptom of an underlying vision problem.
What Causes Night Blindness?
Night blindness happens when certain cells in the retina, responsible for vision in dim light, are affected. Causes include:
- Nearsightedness
- Glaucoma or its medications
- Cataracts
- Diabetes
- Retinitis pigmentosa
- Vitamin A deficiency
- Keratoconus (steeply curved cornea)
Do You Have Night Blindness?
Ask yourself:
- Do you bump or trip in dark areas at home?
- Is driving at night difficult?
- Do you avoid going out at night for fear of tripping?
- Does it take your eyes a long time to adjust to changes in light?
What to Do
If you struggle with vision in low light, consult an ophthalmologist. A full eye exam can uncover the cause, and treatment depends on the condition. For instance:
- Glasses may help if nearsightedness is the issue.
- Cataract surgery can improve vision in dim light.
Addressing the underlying cause can help you see more clearly and confidently, day or night.
Reference:
Shedding Light on Night Blindness, available at: https://www.aao.org/eye-health/news/shedding-light-on-night-blindness, last accessed on 18th December 2024.