Sheep Eye Dissection Analysis

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On the exterior of the eye, there are rectus muscles that helps the eye turn. The white of the eye, which is actually really tough, is the sclera. 

When a person sees, light first passes through a hard shell called the cornea. It helps focus light and protects the eye against the dust and other particles. The iris, which is behind the cornea, controls the amount of light that enters through the pupil and hits the lens. Between the lens and the cornea is the aqueous humor, a liquid that maintains the pressure of the eyeball. The light is bent by the lens to focus the light onto the retina at the back of the eye. Ciliary muscles alters the curve of the lens to help focus the light. In the retina, rods and cones detect color and gray scale to send messages to the brain. Where the optic nerve starts, we have a blind spot where there is a lack of rods and cones. Under the retina is the choroid that supplies the eye with blood. The optic nerves and blood vessels funnel together at the back of the eye. Visual messages are then sent to the brain. Vitreous humor in the main cavity of the eye ball maintains the shape of the eye.