What do the ciliary muscles do when you are focusing on a nearby object?   

What is the least distance of distinct vision for a normal human eye?

How many centimetres is the near point of a normal human eye?

(Write only the magnitude without units in the given box.)

What is the range of vision of a normal human eye?

Name the part of our eyes which helps us to focus near and distant objects in quick succession.

(Choose from: Optic nerve/ Iris/ Ciliary muscles)

Give the scientific name of the part of the eye that carries signals from an eye to the brain.

Give the scientific names of the following parts of the eye:

Muscles which change the shape of the eye-lens. (Include muscle in the answer)