Question

state functions of retina, Pupil, Iris ,optic nerve ​

Answer 1

Retina is at the back of eye where image is formed.(similar to a curtain)

Pupil is just a hole like wherein light enters the eyes.

Iris accommodates the size of pupil thus, controlling the amount of eyes entering the eyes.

Optic nerve sends the signal to brain.

Hope it helps you out!!!!

Answer 2

retina - inner delicate layer of eye where there are sensory cells like rods and                 cones. here the light rays converge and get transferred to impulse

pupil - it is a small circular region which allows passage of light rays into the eye from outside

iris - it is coloured part of eye which helps in changing size of pupil in different circumstances like dim light, bright light

optic nerve - nerve fibres that arise from retina of eye at black spot and transfer impulse to brain for retina

hope it helps

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