Question

what is the function of cornea,Iris,crystalline lens,retina,Pupil,ciliary muscle and optic nerve

Answer 1

Crystalline lens;
it merely provides the finer adjustment of focal length required to focus objects at different distances or retina.

Answer 2

Answer: Cornea : helps to protect the eyes from dust particles and etc

               Iris : controls the size of the pupil

               crystalline lens : helps to converge the light so that it meets at retina

               Retina : helps in capturing image

               Pupil : regulate the entry and exit of light

               Ciliary muscle : helps in changing the focal length of lens

               Optic nerve : to transfer visual information from the retina to the vision centers of the brain via electrical impulses.

Explanation: