Question

In the given diagram label A, B, C and D and give the function of B and D.

Answer 1

A= Cornea 

B = Ciliary muscles 

C= Retina 

D= Optic nerve 

Function of B and D are: 

B : Ciliary muscles: It helps in holding the eye lens and changing or adjusting the focal length of the lens. 

D : Optic nerve: It sends the electrical signal from retina to the brain.