The transparent cornea occupies the front center part of the external tunic. The sclera provides attachments for the muscles that control the eye’s movement ( see above). With its external surface being white-coloured, it is commonly known as the “white of the eye”. ![]() The sclera covers nearly the entire surface of the eyeball. The fibrous tunic is composed of the sclera and the cornea. The eye’s outer layer is made of dense connective tissue, which protects the eyeball and maintains its shape. They consist of different tissue and serve different functions. The eyeball is surrounded by a three-layered wall, the three coats of the eye. The following chapters will explain anatomy and function of the three coats as well as of the inner part of the eyeball. the inner part of the eyeball: it contains the lens and the vitreous body and is divided into the anterior and the posterior chamber.the three coating layers: the outer, middle and inner coat. ![]() Six special muscles that insert at different sites outside the eyeball work together to control eye movement.Įach eyeball houses the following parts of the eye: Additional structures protecting the eye include the eyelids, the outer coating layer of the eye (fibrous tunic), the conjunctiva, and the lacrimal glands. The orbits are covered with fatty and fibrous tissue to protect the eye. Human eyes primarily consist of two globe-shaped structures, the eyeballs, which are surrounded by the the bony sockets of the skull, the orbits. The optic nerve transmits these signals to the brain, which forms an image so thereby providing sight. It collects light from the visible world around us and converts it into nerve impulses.
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