The cones are located in

As compared to rods,the cones are ...... times less sensitive.

The friction between the eyelids and the cornea is avoided by the secretion of

The colored visible part of the eye is known as:

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?

In the human eye,the image formed on the retina is: