Eye Health: Anatomy

Cornea - The transparent layer at the front of the eye that plays an important role in focusing light and protecting the back of the eye.

Sclera - The durable white layer that forms the shape of the eye. Its durability aids in protecting other structures of the eye.

Iris - The iris is the colored part of the eye that is unique for each person. It is composed of muscles that control the size of the pupil.

Pupil - A window formed by the iris that allows light to enter the eye. It changes size depending on light conditions. This adaptation allows for protection of the retina and is important for our focusing system.

Lens - A transparent disc that sits behind the iris. Changes to the shapes of the lens allows for focusing of images at different viewing distances. UV light can damage the lens, causing it to become yellow which is called a cataract.

Ciliary Body - A continuation of the iris, the ciliary body is the muscle responsible for changing the shape of the lens to aid in focusing when viewing objects at different distances.

Vitreous - The clear jelly inside the eye that helps to form the shape of the eye.

Retina - An important layer at the back of the eye that collects all the light information that enters the eye which then is transmitted to the brain for processing via the optic nerve. Notably rods and cones are one of the many cells that the retina is composed of.

Macula - The pertinent area of the retina that is important for seeing fine detail and color vision.

Optic Nerve - The nerve that carries all the light information collected by the retina to the brain for processing.

Choroid - A layer of the eye that is composed of many blood vessels responsible for providing oxygen and nutrients to many structures inside the eye.