Formation of Image in Human Eye

The human eye is a complex organ that is responsible for vision. It captures the light that enters the eye and converts it into electrical impulses that are sent to the brain for interpretation. The image formation in the human eye involves the following steps:

1. Cornea:
The cornea is the transparent outer layer of the eye that covers the iris, pupil, and anterior chamber. It acts as a protective barrier and helps to refract (bend) light as it enters the eye.

2. Pupil:
The pupil is the black circular opening in the center of the iris. It controls the amount of light that enters the eye by dilating (opening up) or constricting (closing down) in response to changes in light intensity.

3. Lens:
The lens is a transparent, biconvex structure located behind the iris. It helps to focus light onto the retina by changing its shape. The process of changing the shape of the lens is called accommodation.

4. Retina:
The retina is the innermost layer of the eye that contains photoreceptor cells called rods and cones. These cells convert light into electrical impulses that are sent to the brain via the optic nerve for interpretation.

5. Optic Nerve:
The optic nerve is a bundle of nerve fibers that carries the electrical impulses from the retina to the brain.

6. Brain:
The brain receives the electrical impulses from the optic nerve and interprets them as images.

Conclusion:
Thus, the image is formed on the retina of the human eye. The cornea and lens work together to focus the light onto the retina, which contains the photoreceptor cells that convert the light into electrical impulses that are sent to the brain for interpretation.