Eye Disection Lab

INTRODUCTION:

The eye is the biological receptor for light (electromagnetic energy). The eyes of animals have one or more lenses that focus the light on a retina of some kind. The retina has biological structures that react to the light, and different animals have receptors that chemically react to different colors of light and also different wavelengths of light. The chemical changes caused by the light are coupled to the brain as neurological signals, and the visual cortex or visual area of the brain interprets the signals. One visual problem that I know of is color blindness. Color blindness is where the person who has this problem mixes up colors or does not see certain colors. Color blindness is most often a genetic visual deficiency that limits the colors that an individual can detect. The purpose of the fat around the eye is to support the eye structure.

An eyelid is a thing fold of skin that covers and protects an eye. The human eyelid features a row of eyelashes. The eyelids key function is to regularly spread the tears and other secretions on the eye surface to keep it moist, since the cornea must be continuously moist. They keep the eyes from drying out when asleep. Moreover, the blink reflex protects the eye from foreign bodies. An eyelash is simply a lash that is one of the hairs that grow at the edge of the eyelid. Eyelashes protect the eye from debris and perform some of the same function as whiskers do on a cat or a mouse in the sense that they are sensitive to being touched, thus providing a warning that an object is near the eye. The choroid, also known as the choroidea or choroid coat, is the vascular layer of the eye, containing connective tissue, and lying between the retina and the sclera. The human choroid is the thickest at the far extreme rear of the eye, while the outlying areas it narrows. The choroid provides oxygen and nourishment to the outer layers of the retina. Along with the ciliary body and iris, the choroid forms the uveal tract. The structure of the choroid is generally divided in four layers. The Haller's layer, which is the outermost layer of the choroid consisting of larger diameter blood vessels. The Sattler's layer, which is the layer of medium diameter blood vessels. The Choriocapillaris that is the layer of capillaries. And the Bruch's membrane, which is the innermost layer of the choroid.

The eyebrow is an area of thick, delicate hairs above the eye that follows the shape of the lower margin of the brow ridges of some mammals. Their main function is to prevent sweat or water, and other debris, from falling down into the eye socket, but they are also important to human communication and facial expression. It is common for people - women in particular - to modify their eyebrows by means of hair addition, removal, make up, or piercings. The pupil is a hole located in the center of the iris of the eye that allows the light to enter the