The optic nerve connects the eye to the brain. The optic nerve carries the impulses formed by the retina, the nerve layer that lines the back of the eye and senses light and creates impulses.
Optic nerve. Optic neuritis is an inflammation of the optic nerve, the bundle of nerve fibers that transmits visual information from your eye to your brain. Pain and temporary vision loss are common symptoms of optic neuritis Definition of OPTIC NERVE. : either of the second pair of cranial nerves that pass from the retina to the optic chiasma and conduct visual stimuli to the brain — see eye illustration. See optic nerve defined for kids. ADVERTISEMENT. Optic nerve: The optic nerve connects the eye to the brain. The optic nerve carries the impulses formed by the retina, the nerve layer that lines the back of the eye and senses light and creates impulses. These impulses are dispatched through the optic nerve to the brain, which interprets them as images. Using an ophthalmoscope, the head of the optic nerve can be easily seen. The word optic comes from the Greek optikos, pertaining to sight. Aside from the optic nerve, the eye has a number of other components. These include the cornea, iris, pupil, lens, retina, macula, and vitreous. Glaucoma is one of the most common illnesses affecting the optic nerve. Glaucoma is caused by high intraocular pressure, or high pressure in the fluid that is inside the eye (vitreous fluid). This high pressure compresses the optic nerve and causes cells to die. It is referred to as atrophy of the optic nerve. Optic nerve. The optic nerve is located in the back of the eye. It is also called the second cranial nerve or cranial nerve II. It is the second of several pairs of cranial nerves. Optic Nerve eye-definition and function. Optic Nerve-the second cranial NERVE, which conveys nerve impulses from the EYE to the BRAIN. There are two optic nerves, one from each eye. The fibers that become the optic nerve originate in the occipital lobes of the cerebrum, in an area called the visual cortex.  Multimedia. Glaucoma is a group of eye conditions that damage the optic nerve, which is vital to good vision. This damage is often caused by an abnormally high pressure in your eye. Glaucoma is one of the leading causes of blindness in the United States. It can occur at any age but is more common in older adults.  Glaucoma is a group of eye diseases causing optic nerve damage. The optic nerve carries images from the retina, which is the specialized light sensing tissue, to the brain so we can see. In glaucoma, eye pressure plays a role in damaging the delicate nerve fibers of the optic nerve.  The lens is the transparent structure inside the eye that focuses light rays onto the retina. The retina is, as mentioned, the nerve layer that lines the back of the eye, senses light and creates impulses that go through the optic nerve to the brain. The word optic comes from the Greek optikos, pertaining to sight. Aside from the optic nerve, the eye has a number of other components. These include the cornea, iris, pupil, lens, retina, macula, and vitreous. : either of the pair of sensory nerves that comprise the second pair of cranial nerves, arise from the ventral part of the diencephalon, form an optic chiasma before passing to the eye and spreading over the anterior surface of the retina, and conduct visual stimuli to the brain—called also second cranial nerve. : either of the second pair of cranial nerves that pass from the retina to the optic chiasma and conduct visual stimuli to the brain — see eye illustration. See optic nerve defined for kids. ADVERTISEMENT.
http://www.mayoclinic.org/diseases-conditions/optic-neuritis/basics/definition/CON-20029723 http://www.merriam-webster.com/dictionary/optic%20nerve http://www.medicinenet.com/script/main/art.asp?articlekey=4653 http://www.healthline.com/human-body-maps/optic-nerve http://beltina.org/health-dictionary/optic-nerve-eye-definition-function.html http://www.mayoclinic.org/diseases-conditions/glaucoma/basics/definition/con-20024042 http://kellogg.umich.edu/patientcare/conditions/glaucoma.html http://www.medicinenet.com/script/main/art.asp?articlekey=4653 http://www.merriam-webster.com/dictionary/optic%20nerve
eye optic nerve definition