The eye lens is held in place by:

Analogy type question:
$(1)$ Photoreceptor cells : Cones : Dim light vision : ........
$(2)$ Eyeball contains transparent crystalline : Lens : : In front of the lens : .........

Answer briefly:
$(a)$ How do you perceive the colour of an object?
$(b)$ Which part of our body helps us in maintaining the body balance?
$(c)$ How does the eye regulate the amount of light that falls on the retina?

When the eye looks at near objects,the lens becomes more convex due to the

In glaucoma,which of the following occurs?

Vitamin $A$ is necessary for the proper physiological function of the eye because