Macula lutea is part of

The lens and cornea do not have a blood supply. Therefore, the nutrients are supplied by:

The space between the cornea and the lens is called .....

The visual acuity is the greatest at

Cone cells are sensitive to which main colors?

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?