The eye is made up of three coats, which enclose the optically clear aqueous humor, lens, and vitreous body. The outermost coat consists of the cornea and the scleroses; the middle coat contains the main blood supply to the eye and consists, from the back forward, of the choroid, the cilia body, and the iris.

                Interesting facts 

The human eye can detect a vast array of colors, ranging from deep red to bright violet. This ability is due to specialized cells in the retina called cones, which are sensitive to different wavelengths of light. People with normal color vision can distinguish between over a million colors, making the world around us dazzling and varied.

2. The human eye can detect light as dim as a single photon.

Photons are the smallest light units, and the human eye can detect them. Under the right conditions, such as when the eye is completely dark-adapted, the rods in the retina can detect a single photon of light. This remarkable sensitivity is due to the ability of the rods to amplify the signals they receive from light, making them able to detect even the faintest glimmer.

3. The human eye can change its focus up to 50 times per second.

The human eye is a remarkable piece of machinery that adapts to changing conditions in real-time. One of its most impressive abilities is quickly and accurately changing its focus, allowing us to easily see objects at different distances. This ability is controlled by the ciliary muscles, which alter the lens’s shape to adjust the eye’s focus.

4. The human eye has a blind spot.

Despite its many remarkable features, the human eye has a blind spot where the optic nerve enters the eye. This spot is where the nerves and blood vessels that supply the eye enter and exit, not covered by light-sensitive cells. However, the brain can fill in the missing information so that we are unaware of the blind spot.

5. The human eye can regenerate itself.

Unlike many other organs in the body, the human eye can regenerate itself to a certain extent. The outer layer of the eye, the cornea, can repair itself after an injury or scratch. The eye also contains stem cells that can differentiate into different types of cells, allowing for the potential regeneration of damaged tissue.