4) Explain the functions of pupil, retina and iris in the eye.
Answers
Answer:
) Light passes through the cornea covering the eye which refracts it.
2) The iris regulates the size of the pupil which controls how much light is allowed to enter the eye.
3) Behind the pupil is the lens that focuses light (or an image) onto the retina .
4) The retina contains many photoreceptor cells that convert light into electric signals.
5) These signals are processed further then travel through the optic nerve to be collected and interpreted by the brain.
Answer:
Pupil is black hole like located in Iris. It controls the amount of light entering our eye by dilating or constricting itself.
Retina is situated inside eye. It is the surface where the light from an object falls and the light sensitive cells create a signal which is conducted further through optic nerves and an image is created in brain.
Iris is the colourful part of our eye and it controls the size of pupil; when necessary.