The eyeball is a bilateral and spherical organ, which houses the structures responsible for vision Humans have two eyes, situated on the left and the right of the face The eyes sit in bony cavities called the orbits, in the skull There are six extraocular muscles that control eye movements The front visible part of the eye is made up of the whitish sclera, a coloured iris, and the pupil. The eye is cushioned within the orbit by pads of fat
In addition to the eyeball itself, the orbit contains the muscles that move the eye, blood vessels, and nerves The orbit also contains the lacrimal gland that is located underneath the outer portion of the upper eyelid. These muscles move the eye up and down, side to side, and rotate the eye The extraocular muscles are attached to the white part of the eye called the sclera This is a strong layer of tissue that covers nearly the entire surface of the eyeball This illustration shows eye muscles, which control eye movement.
The eyeball consists of three layers Fibrous, vascular and nervous (retina) Functionally, the most important layer is the retina, which receives the external visual stimuli. Skin that covers the upper part of the eyeball, including the cornea, when closed. Being able to describe different parts of a human eyeball Know which parts of the eyeball are involved in accommodation
Know what a blind spot on the retina is, and where it’s located. The eyeball is a spherical organ that contains the structures necessary for vision It is composed of several layers, including the sclera, cornea, choroid, retina, and vitreous body. It is like the central hub of your retina, which is at the back of your eyeball When light enters your eye, it hits the retina, where cells called photoreceptors turn it into electrical signals These signals travel to your brain through the optic nerve, creating the images you see.
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