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★explain the structure of eyeball with full explanation of parts with their function
★ name the nerve which carries the the image from Eye to the brain in form of Nerve impulses
•Full explanation.
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Answers
The cornea, a clear window at the front of the eye, covers the iris and the pupil. A clear lens, located behind the pupil, acts like a camera lens by focusing light onto the retina at the back of the eye. The retina is a light-sensitive inner lining at the back of the eye.
Structure of the eyeball. The eye is a highly specialized sensory organ located within the bony orbit. The main function of the eye is to detect the visual stimuli (photoreception) and to convey the gathered information to the brain via the optic nerve (CN II).
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★The sclera, or white part of the eye, protects the eyeball. ... The cornea, a clear window at the front of the eye, covers the iris and the pupil. A clear lens, located behind the pupil, acts like a camera lens by focusing light onto the retina at the back of the eye.
★optic nerve
The optic nerve carries signals from the retina to the brain, which interprets them as visual images.The optic nerve, also known as cranial nerve II, or simply as CN II, is a paired cranial nerve that transmits visual information from the retina to the brain. In humans, the optic nerve is derived from optic stalks during the seventh week of development and is composed of retinal ganglion cell axons and glial cells; it extends from the optic disc to the optic chiasma and continues as the optic tract to the lateral geniculate nucleus, pretectal nuclei, and superior colliculus.
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