The sense I chose to survey this week is sight//vision. I have always wondered how we are able to see such vivid colors and details of everything.
The elements of the system of sight are: light, the cornea, the iris, the pupil, the lens, ciliary muscles, the retina, the optic nerve, and the brain.
In order to create vision, light must first pass through the cornea, the part that covers the front of the eye. The cornea refracts the light. From there, the iris, or the colored part of your eye, regulates the size of the pupil, which controls the amount of light that enters the eye. Behind the pupil is the lens, which focuses the light onto the retina. The ciliary muscles surround the lens. When the muscles relax, they allow the eye to see objects that are far away. To see closer objects clearly, the ciliary muscle must contract in order to thicken the lens. The retina converts light into electrical signals that travel through the optic nerve to the brain, which allows us to see. The purpose of this system is to allow us human beings to be able to see in great detail and be more aware of our surroundings.