To help you understand the structure and anatomy of the external eye and its functions, explore and study the Eye Ball Diagram in the following images below!
If you observe the Eye Ball Diagram above, the eyeball is a bilateral and spherical organ, which houses the structures responsible for vision. It lies in a bony cavity within the facial skeleton or is usually known as the bony orbit. The eyeball can be divided into three parts: the fibrous, vascular and inner layers. These layers have different structures and functions. Look at these layers in further detail.
The fibrous tunic is composed of the cornea and sclera. The middle layer, known as the vascular tunic or uvea, consists of the choroid, ciliary body, pigmented epithelium, and iris. The innermost is the retina, which gets its oxygenation from the blood vessels of the choroid (posteriorly) as well as the retinal vessels (anteriorly). The retina is an extremely metabolically active layer of nerve tissue made up of millions of light receptors.
The sclera is composed of dense fibrous tissue that covers four-fifths of the eyeball and provides attachments for the muscles that move the eye. Other important structures in the eyeball include the iris and the lens. We also give you the myopia diagram for you to study the eyesight problem. Myopia is the short sight leads to blurred distance vision, whilst close vision is usually normal. The above-labeled diagram can be modified based on your own needs. Make sure to visit more of our posts with educative diagram contents!