ABO Study Guide Binder

Outer layer of eye. Consists of Sclera & Cornea

Middle layer of eye. Provides nourishment. Consists of Iris, Choroid & Ciliary Body.

Inner layer of eye. Consists of Retina.

The volume between Cornea & Iris.

The Volume between Iris & Lens

The liquid that both chambers contain. This liquid is produced by the Ciliary Body. It maintains the pressure of the eye & provides nutrients to the Cornea & Lens.

Constantly draining the Aqueous Humor.

Greatest volume of the eye. Takes up 4/5 of the eye. It is found between the Retina & the lens. Filled with Vitreous Humor.

Maintains the eye's shape.

Transparent dome shaped where light enters. Has 5 layers. Epithelium, Bowman's Membrane, Endothelium, Descemet's Membrane & Stroma.

Quickly regenerates.

Tough. Difficult to penetrate barrier.

Inner most layer, removes water from Cornea

Middle layer between two membranes. Makes up 90% of thickness in Cornea.

Light passes through this.

Controls the amount of light that enters the eye. The colored part of the eye. Has two muscles. The Dilator Muscle & Sphinctor Muscle.

Opens the pupil allowing more light.

Closes the pupil. Restricting light.

Focuses light on the Retina.

The process of focusing on objects based on the distance.

Surrounds the lens. Helps lens achieve accommodation.

Attaches Ciliary body to lens through fibrious strands called Zonules.

Consists of photoreceptor cells called rods and cones.

Mainly for night vision and peripheral vision.

Primary function of detail & color. There are about 6 million in the Retina.

Center of the Retina. Where most of the cones are placed.

Normal Vision

Near sighted. The eye is longer than normal, curve of the cornea is too steep so light comes to focus in front of the retina. Corrected with a minus lens. Can see objects at near.

Far Sighted. The eye is shorter than normal, the curve is too flat so light comes to focus behind the retina. Corrected with a plus-powered lens. Can see objects at a distance.