Question

___________ helps in image formation by focusing light on the retina.

• A. Pupil
• B. Eye lens
• C. Optic nerves
• D. Rods and cones

Answer 1

The correct option is B Eye lens

• The pupil is the hole through which the light enters the human eye.
• Eye lens focuses the light on the retina thus forming a clear image.
• Optic nerves send the images formed on the retina to the brain.
• There are two
  kinds of cells–
  (i) cones, which are sensitive to bright
  light and
  (ii) rods, which are sensitive to dim light.

Eye lens is what helps in image formation by focusing the light on the retina.