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NDA 2022 GAT · General Knowledge · Light and Optics · medium

The part of the human eye that controls the amount of light entering it is the

Single correct option

The part of the human eye that controls the amount of light entering it is the
  1. A. iris
  2. B. retina
  3. C. cornea
  4. D. lens
Show answer and solution

Answer: (A) iris

The iris is a muscular diaphragm that changes the size of the pupil, so it controls light entry. The retina holds light-sensitive cells, the cornea refracts most of the light, and the lens adjusts the focus.
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Original question written in the NDA 2022 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake