Dictionary > Night blindness

Night blindness

night blindness
failure or imperfection of vision at night or in dim light, with good vision only on bright days.
Inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder.A deficiency caused by a lack of vitamin A, which is commonly found in vegetables such as carrots. A lack of this in the diet results in the membrane of the eye not functioning properly, and in this instance an inability to adapt to changing light conditions.


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