How does the human eye work?
The human eye works by sending light through a number of specialized parts to the optical nerve directly to the brain. Parts of light processing include cornea, pupil, crystalline lens, retina and finally the optical nerve itself. Each part of the eye has a specific task to help the brain to receive signals that can translate into a usable visual input. The eye movement is controlled by a series of muscles that are used to direct the eye. The pupil's size determines how much light enters into the eye.
The light first enters the human eye with a transparent layer called the cornea. The cornea has no blood supply and instead receives oxygen directly from the air. It is shaped to begin to refract the light waves towards the rest of the eye. The healthy cornea is slightly stronger on the edges than in the center, but if the cornea is due to illness or injury, the light entering the eye distorted.
The pupil is another passage for visible light. Reflex called Pupillary Lights Response changes the size of the pupil reflexively as bright is the lighto. Once the light passes through the cornea and the pupil, it passes through a transparent gel material-anemistive humor-which further reflects the light waves to achieve crystalline lenses. A crystalline lens is a flexible structure that is adjusted according to the distance or size of the desired source of the visual input. This is, unlike the cornea, which is determined when enlargement.
lens becomes a stronger focus on objects at shorter distances. It compares to other or smaller objects. People who undergo surgery cataracts and receive artificial lenses do not have this advantage. The picture that can be seen through the lens is actually upside down at this point and backwards for the nature of Lightwav. The brain is able to perceive this topsy-time image correctly.
travels to the human eye from the lens to the retina by another pure cloth called through humor. There is even more quarry in this substance. The retina is mainly a collection of nerve sales called photoreceptors that are able to perceive a certain rozSah light waves of the electromagnetic spectrum.
Photoreceptors consist mainly of rods and cones. The families work in fat light and can perceive black and white. The cones perceive color and work in brighter light. The retina also has photoreceptors that help the eye respond to bright light. These rare photoreceptors are called photosensitive ganglia cells.
After processing the retina, the light reaches the optical nerve, which then sends the information to the brain. The brain is able to interpret these combinations of light waves to understand human consciousness. Specifically, the retina converts light to electrical signals and sends signals to the back of the brain. The Tlidian eye serves as a pipe for passing and converting light energy, but it is the brain that really sees.