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Which vitamin deficiency causes night blindness?
Vitamin B
Vitamin C
Vitamin A
Vitamin D
Vitamin A
Night blindness (nyctalopia), the inability to see clearly in dim light or darkness, is primarily caused by a deficiency of Vitamin A. Vitamin A is a vital nutrient required for the proper functioning of the retina and the health of corneal tissues.
Night blindness (nyctalopia), the inability to see clearly in dim light or darkness, is primarily caused by a deficiency of Vitamin A. Vitamin A is a vital nutrient required for the proper functioning of the retina and the health of corneal tissues.
Think of Vitamin A as the essential ink needed to print the low-light vision 'tickets' inside your eyes; without enough ink, your vision fades out as soon as the sun goes down.
A for Adaptation тАФ Vitamin A helps your eyes adapt to the dark!
Vitamin A is a precursor to retinal, which combines with the protein opsin to form rhodopsin, the primary light-sensitive pigment in the rod cells of the retina. When Vitamin A is deficient, rhodopsin cannot be effectively regenerated, severely impairing the eye's ability to adapt to low-light conditions.
Vitamin A is chemically known as retinol.
Severe or prolonged Vitamin A deficiency can lead to xerophthalmia and permanent blindness.
Rich dietary sources include carrots, sweet potatoes, green leafy vegetables, liver, and dairy products.
Nutritional epidemiology and public health supplementation programs
Clinical diagnosis of retinal and ocular disorders
Option A (Vitamin B deficiency) causes diseases like beriberi or scurvy-related issues? No, Vitamin B deficiency leads to beriberi, pellagra, or anemia.
Option B (Vitamin C deficiency) causes scurvy, characterized by bleeding gums and joint pain.
Option D (Vitamin D deficiency) causes rickets in children and osteomalacia in adults.
C is correct тАФ Vitamin A deficiency leads to night blindness due to impaired rhodopsin synthesis in the retina.
Memorize the scientific names and deficiency disorders for all water-soluble and fat-soluble vitamins, as they are a high-yield topic for railway and competitive exams.
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