By Eyecare NGOverview | Wall of the Eye | Inner Parts | Accessory Structures
The eye is one of the sense organs of the body. It is responsible for sight. This page contains a description of the structure of the eye and its components
The eye is like a ball with most part of it sitting in a hole in the skull known as eye socket or orbit. The eye has a multilayered wall and the space inside it contains the lens and the fluids that help to keep the eye in shape.
In the orbit, the eye is surrounded by orbital fats and fibrous tissues that cushion it, as well as extraocular muscles that move it to different directions. In front, the eye is protected by the eyelids, conjunctiva and the lacrimal system.
The wall of the eye
The wall of the eye is made up of three layers namely:
- The outer layer, which consists of the cornea and sclera
- The middle layer, which consists of the iris, the ciliary body and the choroid
- The inner layer, which consists of the retina
The outer layer
This is made up of thick fibrous tissues that protect the inner structures of the eye. The outer layer consists of the cornea and sclera.
The middle layer
The middle layer is the vascular part of the eye. It is known as the uvea and consists of the iris, ciliary body and choroid.
The inner layer of the eye is the most sensitive part of the eye known as retina.
The inner part of the eye is the area surrounded by the 3 layered wall. It contains the lens and spaces (chambers) filled with aqueous and vitreous humour.
These are structures external to the eyeball that work with other components of the eye to ensure good vision. They include conjunctiva, eyelid, lacrimal system and extraocular muscles.