Disease or Syndrome
optic nerve disorder
chi·as·ma nerve dis·or·der
Subclass of:
Cranial nerve diseases;
Disorder of eye
Definitions related to disorder of the optic nerve:
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(optic nerve disorder) A non-neoplastic or neoplastic disorder affecting the optic nerve (second cranial nerve).NCI ThesaurusU.S. National Cancer Institute, 2021
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(optic nerve diseases) Conditions which produce injury or dysfunction of the second cranial or optic nerve, which is generally considered a component of the central nervous system. Damage to optic nerve fibers may occur at or near their origin in the retina, at the optic disk, or in the nerve, optic chiasm, optic tract, or lateral geniculate nuclei. Clinical manifestations may include decreased visual acuity and contrast sensitivity, impaired color vision, and an afferent pupillary defect.NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
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(optic nerve disorders) The optic nerve is a bundle of more than 1 million nerve fibers that carry visual messages. You have one connecting the back of each eye (your retina) to your brain. Damage to an optic nerve can cause vision loss. The type of vision loss and how severe it is depends on where the damage occurs. It may affect one or both eyes. There are many different types of optic nerve disorders, including: Glaucoma is a group of diseases that are the leading cause of blindness in the United States. Glaucoma usually happens when the fluid pressure inside the eyes slowly rises and damages the optic nerve.; Optic neuritis is an inflammation of the optic nerve. Causes include infections and immune-related illnesses such as multiple sclerosis. Sometimes the cause is unknown.; Optic nerve atrophy is damage to the optic nerve. Causes include poor blood flow to the eye, disease, trauma, or exposure to toxic substances.; Optic nerve head drusen are pockets of protein and calcium salts that build up in the optic nerve over time. Contact your health care provider if you are having vision problems. Tests for optic nerve disorders may include eye exams, ophthalmoscopy (an examination of the back of your eye), and imaging tests.MedlinePlusU.S. National Library of Medicine, 2021
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(optic nerve disorder) A disorder characterized by involvement of the optic nerve (second cranial nerve).Common Terminology Criteria for Adverse EventsU.S. National Institutes of Health, 2021
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The small photoreceptor cells of the retina (the inner surface at the back of the eye) sense light and transmit impulses to the optic nerve. The optic nerve from each eye carries impulses to the brain, where visual information is interpreted.Merck & Co., Inc., 2020
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