Question

Deficiency of vitamin A in the body results in insufficient rhodopsin in the rods which leads to

• A. Colour blindness
• B. Total blindness
• C. Night blindness
• D. Myopia

Answer 1

Answer: (C)

Night blindness

Nyctalopia also called night blindness, is a condition making it difficult or impossible to see in relatively low light. It is a symptom of several eye diseases. Night blindness may exist from birth, or be caused by injury or malnutrition (for example, a lack of vitamin A). It can be described as insufficient adaptation to darkness.
Rhodopsin helps seeing lighted things and is synthesized in the presence of vitamin A (retinol). Its deficiency leads to lack of clear vision during night.