Human Eye & Colourful World (C10)

Write the function of each of the following parts of human eye:

  1. Cornea
  2. Iris
  3. Crystalline lens
  4. Ciliary muscles


Cornea: focuses light rays and permits the light to enter the eye.

Iris: Controls amount of light entering the eye and controls the size of pupil.

Crystalline Lens: Converges light rays onto retina.

Cilliary Muscles: Adjusts focal length of eye lens by contraction and relaxation so that sharp image can be obtained on the retina. It helps in accommodation.