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Night blindness (medically termed nyctalopia) is a condition where the eyes exhibit a diminished ability to see clearly in low-light environments, such as during night driving or navigating a dimly lit room. It indicates a severe failure of the eye to properly adapt to darkness.
read more about night blindness nyctalopia ...Effective sight in low light relies on the rod cells in your retina. Night blindness occurs when these rod cells are damaged (e.g., in retinitis pigmentosa) or when incoming light is excessively scattered before reaching the retina (a common effect of a cataract). This results in poor contrast, blurred vision, and reduced peripheral sight at night.
It can be. While it is sometimes caused by easily correctable issues like a dense cataract or uncorrected high nearsightedness (myopia), it may also be the first sign of a very serious, progressive genetic condition like retinitis pigmentosa, which can cause significant and permanent vision loss over time.
Yes. Since night blindness is always a symptom of an underlying medical condition, a proper diagnosis and prescription treatment plan is required. Treatment may involve an updated prescription for glasses, a surgical referral to remove a cataract, or ongoing medical management for a retinal disease.
Management is focused on identifying and treating the underlying cause.
Is it normal to see worse at night as I get older?
While a slight decrease in vision is normal with age, severe night blindness signals a problem like cataracts that necessitates an examination by an eye doctor.
Can diet fix night blindness?
Only if the cause is a very rare case of severe Vitamin A deficiency. For most individuals, the cause is a structural eye problem.
What's the difference between this and just poor vision?
Nyctalopia is the specific inability to adapt to low light, even if an individual's daytime acuity is otherwise normal.