Individuals with night blindness can still see at night, but with less clarity compared to those with normal vision.

Night blindness can be caused by various conditions, such as advanced glaucoma, retinal pigment degeneration, Vitamin A deficiency, and poor nourishment of the rod cells in the retina. It occurs due to damage to the rod cells on the retina, which are responsible for dark vision, preventing them from functioning normally. Diagnosis can be confirmed through dark adaptation tests and electroretinography at an ophthalmology department in hospitals. Treatment for night blindness should be based on the underlying cause; for instance, if caused by Vitamin A deficiency, the condition can be treated by supplementing Vitamin A, thus either restoring health, or preventing and slowing further deterioration of the condition.