Explain the functions of different parts of a human eye with a neat diagram.
Answers
hope it helps you
follow me and mark as brainlest answer please
Different parts of an eye are:
a) Cornea - It is the transparent front part of the eye.
b) Iris - It is a dark muscular structure present behind the cornea. It gives the distinctive colour to the eye. The Iris consists of a small opening called Pupil through which the light enters the eye. The iris controls the amount of light entering the eye by adjusting the size of the pupil.
c) Lens- The lens present inside the eye is convex. The eye lens is located behind the Pupil which helps to focus light on the back of the eye.
d) Ciliary muscles- it is the ring of muscles to which the eye lens is attached. These muscles make the lens thick and thin according to need.
e) Retina- Retina is a layer located behind the lens at the back of the eye. The retina consists of several Nerve cells. The two types of nerve cells in the retina are:
- Rods - They are sensitive to dim-light.
- Cones - they are sensitive to bright light.
f) Optic Nerve- Sensations felt by the nerve cells of the retina are transmitted to the brain through the optic nerves.
g) Blind spot- There is a point in the eye located at the junction of the retina and the optic nerve where no sensory cells are present. This spot is therefore called the blind spot as it does not support any vision.
