Globe

Globe refers to the eyeball apart from its appendages. It is a spherical structure filled with a transparent jelly-like substance, the vitreous humor. The globe is made up of three layers: the sclera, the choroid, and the retina.

Structure of the Globe

The sclera is the outermost layer of the globe. It is a tough, white, fibrous tissue that covers about five-sixths of the surface of the globe. The front sixth is covered by the cornea, a clear structure that allows light to enter the eye.

The choroid is the middle layer of the globe. It is a vascular layer that supplies oxygen and nutrients to the outer layers of the retina.

The retina is the innermost layer of the globe. It is a thin layer of neural tissue that lines the back of the eye and is responsible for converting light into electrical signals that are sent to the brain.

Functions of the Globe

The primary function of the globe is to receive light and convert it into electrical signals that can be interpreted by the brain as visual images. The cornea and the lens within the globe focus light onto the retina. The retina then converts the light into electrical signals that are sent to the brain via the optic nerve.

Related Conditions

There are several conditions that can affect the globe, including:

• Globe rupture: This is a serious injury where the integrity of the outer membranes of the eye is disrupted by blunt or penetrating trauma.
• Globe luxation: This is a condition where the globe is displaced from its normal position in the orbit, usually forward and out of the eyelids.
• Endophthalmitis: This is an inflammation of the interior of the eye, often caused by an infection.

See Also

• Eye anatomy
• Eye diseases
• Ophthalmology

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