sight

Sight is the ability to see. It is the process of light entering the eye and being converted into electrical signals that are sent to the brain. The brain interprets these signals and creates an image of the world around us.

Sight is a very important sense for humans. It allows us to see the world around us, to interact with our environment, and to learn about the world.

There are many different parts of the eye that work together to allow us to see. These parts include the cornea, the iris, the pupil, the lens, the retina, and the optic nerve.

The cornea is the clear covering at the front of the eye. It helps to focus light onto the retina.

The iris is the coloured part of the eye. It controls the amount of light that enters the eye.

The pupil is the black hole in the centre of the iris. It changes size to let in more or less light, depending on the brightness of the environment.

The lens is a clear structure behind the pupil. It helps to focus light onto the retina.

The retina is a layer of cells at the back of the eye. It contains light-sensitive cells that convert light into electrical signals.

The optic nerve is a bundle of nerves that carries electrical signals from the retina to the brain.

The brain interprets the electrical signals from the retina and creates an image of the world around us.

The man lost his sight in an accident.