The vast majority of optic nerve fibres convey information regarding central vision. optic nerve definition: 1. the group of nerve fibres (= structures like threads) that pass signals from the retina at the…. All about optic nerve definition, function, development, anatomy & PPT » Definition ︱ Function ︱ Development ︱ Anatomy ︱ Blood Supply ︱ Powerpoint PPT. Define optic nerve. It occurs when your optic nerve is inflamed. Nerves come in all sizes with some being larger than others while still being normal. (Atrophy means to waste away or deteriorate.) In its short span between the brain and the eye, the optic nerve's whole surface is bathed in cerebral spinal fluid. Optic Nerve Definition. The anatomy of the optic nerve makes it a sensitive marker for problems inside the brain. The optic nerve begins at the optic disk, This fluid protects the nerve from sudden movement. A large optic nerve may be a completely normal variant. Learn more. Optic atrophy is not a disease, but rather a sign of a potentially more serious condition. Optic atrophy is a condition that affects the optic nerve, which carries impulses from the eye to the brain. When the optic nerve is irritated and inflamed, it doesn't carry messages to the brain as well, and you can't see clearly. However there are conditions such as optic nerve swelling that may make a nerve look larger. Optic neuropathy is damage to the optic nerve which, if left untreated, can lead to blindness. This nerve connects the back of each eyeball and its retina to the brain. Definition. The causes of this atrophy are varied, and treating the underlying condition can slow vision loss. Also known as cranial nerve II or simply as CN II, the optic nerve is a paired cranial nerve that carries visual impulses from the innermost layer of the eye, retina to the brain. Optic nerve, second cranial nerve, which carries sensory nerve impulses from the more than one million ganglion cells of the retina toward the visual centres in the brain. Besides MS, optic nerve inflammation can occur with other conditions, including infections or immune diseases, such as lupus. The optic nerve sends messages from your eyes to your brain so that you can interpret visual images. optic nerve synonyms, optic nerve pronunciation, optic nerve translation, English dictionary definition of optic nerve. Learn more. Vision involves many different parts of the eye, but two of the most important are the retina and the optic nerve. Optic neuritis is a condition that affects the eye and your vision. Signs and symptoms of optic neuritis can be the first indication of multiple sclerosis (MS), or they can occur later in the course of MS.MS is a disease that causes inflammation and damage to nerves in your brain as well as the optic nerve.. Optic atrophy results from damage to the optic nerve from many different kinds of pathologies. The optic nerve may malfunction due to different types of illness, the most common being glaucoma. Optic nerve definition is - either of the second pair of cranial nerves that pass from the retina to the optic chiasma and conduct visual stimuli to the brain. The optic nerve carries impulses for sight from the retina in the eye to the brain. It is composed of millions of retinal nerve fibers that bundle together and exit to the brain through the optic disc located at the back of the eye.