Eyeball

Eyeball

The eyeball is a spherical structure located in the eye socket (or orbit) of the skull, in which the lens and retina are housed. It is responsible for receiving light and converting it into electrical signals that the brain can interpret as visual images.

Anatomy of the Eyeball

The eyeball is composed of three layers: the sclera, the choroid, and the retina. The sclera is the white outer layer of the eyeball. The choroid is the middle layer and contains blood vessels that nourish the eye. The retina is the innermost layer and contains the light-sensitive cells that convert light into electrical signals.

Sclera

The sclera is the white, tough, outer layer of the eyeball. It provides protection and form to the eye. The front part of the sclera is visible as the 'white of the eye'.

Choroid

The choroid is the middle layer of the eyeball and is rich in blood vessels. It provides oxygen and nutrients to the outer layers of the retina.

Retina

The retina is the innermost layer of the eyeball. It contains light-sensitive cells called photoreceptors that convert light into electrical signals. These signals are then sent to the brain via the optic nerve.

Function of the Eyeball

The primary function of the eyeball is to receive light and convert it into electrical signals that can be interpreted by the brain as visual images. This process is known as vision.

Diseases and Conditions

There are many diseases and conditions that can affect the eyeball, including glaucoma, cataracts, and macular degeneration. These conditions can lead to vision loss if not treated promptly.

See Also

• Eye anatomy
• Vision
• Eye diseases

Eyeball Resources
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