Name the part of the eye:
(a) which controls the amount of light entering the eye.
(b) which converges light rays to form the image.
(c) on which image is formed.
(d) which carries the image to brain.
(e) which changes the curvature (or thickness) of eye-lens to focus objects lying at various distances.
(a) Iris
(b) Converging lenses
(c) Retina
(d) Optic nerve
(e) Ciliary muscles