This lens helps the eye to automatically focus on near and distant objects, and also the approaching objects, like an autofocus camera lens. The lens of the eye is located behind the pupil, and it focuses light. The iris controls the light that reaches the eye by adjusting the size of the pupil, and thus it functions like the diaphragm of a camera. Light focuses mainly on the cornea, which acts like a camera lens. The human eye operates similar to a digital camera in several ways: Therefore, no vision is possible at this point, and it's called the blind spot. There are no sensory nerve cells at the junction of the optic nerve and retina. Rods: Rods are the nerve cells that are more sensitive to dim lights. Optic Nerves: You can find two types of optic nerves, which are cones and rods.Ĭones: Cones are the nerve cells that are more sensitive to bright light.

It becomes small to focus on objects at a distance and becomes big to focus on nearby objects. The lens alters the shape to focus light on the retina, with the help of ciliary muscles. Lens: The transparent portion situated behind the pupil is called the lens. These electrical impulses are then transmitted through optic nerves to the brain. Its function is to convert the images formed by the lens into electrical impulses. Retina: It is the light-sensitive layer that consists of nerve cells. The iris regulates the amount and intensity of light entering the eyes by adjusting the size of the iris. The colour of the eye is due to the colour of the iris. Iris: It is a dark, muscular tissue and ring-like structure present behind the cornea. It is a protective tough white layer (white part of the eye).Ĭornea: The transparent part in front of the sclera is called the cornea. Sclera: The outer covering of the eye is called the sclera. The pupil’s function is to adjust the amount of light entering the eye. Pupil: The pupil is a small opening in the iris. The most common kinds of muscles that are in the eye are the lateral rectus, medial rectus, inferior oblique, or superior rectus. They are responsible for controlling the movement of the eye. It also assists us in comprehending the operation of a camera.

That so, learning about the structure and operation of the human eye is fascinating. Furthermore, these sense organs are comparable to cameras in that they assist humans in seeing objects when light from the outside enters them. It aids in object visualization as well as the perception of light, colour, and depth. The eye is one of the most significant and sophisticated sense organs that we have as humans. This membrane is made up of millions of nerve cells that clump together behind the eye to form the optic nerve, a huge nerve. The light-sensitive membrane that covers the back of the eye is known as the retina. The cornea, iris, pupil, and lens make up the front of the eye, which focuses the image onto the retina. They focus on the light that's reflected in their eyes. The way your eyes work is similar to how a camera does. We learn 80% of what we know through our senses of sight. We can be aware and see beautiful things around our environment, thanks to our vision. The eyes of all mammals have a non-image-forming photosensitive ganglion in the retina which receives light, adjusts the size of the pupil, regulates the supply of melatonin hormones, and also entertains the body clock. The human eye is a part of the sensory nervous system. The human eye can differentiate between about 10 million colors, and it can also detect a single photo. rods and cones.Ĭonscious light perception, colour differentiation and perception of depth are done by these cells. There are two kinds of cells in the eye i.e. The human eye is an essential organ, which interacts with light and is necessary for the sense of sight or vision.

Human eyeballs