How Do our Eyes Function?

The eyes are the organs of sight. According to the Oxford Dictionary, the eyes are defined as “each of a pair of globular organs in the head through which people and vertebrate animals see, the visible part typically appearing almond-shaped in animals with eyelids.” It may appear to be small but it consists of different parts which work together for it to function well. The eye has a number of components which include the cornea, iris, pupil, lens, retina, optic nerve, and many more.

The parts of the eye: The cornea, is the front layer of the eye, it is a clear covering that rests over the pupil, iris, and anterior chamber. The cornea is an arch formed and it works by bending the light that enters the eye. The pupil is the dark dab in the focal point of your eye that goes about as an entryway for light. It expands in the faint light and shrinks in brilliant light. It’s constrained by the iris. The iris, this part is ordinarily alluded to as one’s eye color. The iris is a muscle that can extend or contract to allow light, contingent upon the light in the environmental factors.

The lens is located behind the iris and pupil. It works with the cornea to focus the light that enters the eye. The ciliary muscles are attached to the surface of the lens. This assists the lens with changing shape to focus. The retina can be found at the back of the eye, the retina multilayer membrane comprising a sensory photoreceptor array that changes the light coming into your eye into electrical signals. These signals are shipped off to the brain where they are perceived as images.

Each of these parts mentioned is equally important for they support each other for the eyes to work. They provide and send information to the brain in order for the brain to process it, which is then useful for the body.

References:

How does the eye work? (2019, February 26). Retrieved from https://www.news-medical.net/health/How-Does-the-Eye-Work.aspx

Vision: Definition, parts of the eye & eye health. (n.d.). Retrieved from https://my.clevelandclinic.org/health/articles/21204-vision