what is wallerian degeneration
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- Wallerian degeneration is a process that results when a nerve fiber is cut or crushed, in which the part of the axon separated from the neuron 's cell body degenerates distal to the injury. This is also known as anterograde or orthograde degeneration.
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- From Wikipedia, the free encyclopedia. Macular degeneration, often age-related macular degeneration (AMD or ARMD), is a medical condition that usually affects older adults and results in a loss of vision in the center of the visual field (the macula) because of damage to the retina. It occurs in dry and wet forms. Hypertension (high blood pressure) Individuals with high blood pressure are more likely to be affected by age-related macular degeneration. 2  This is because high blood pressure, like smoking, leads to a constriction, or narrowing, of the blood vessels in the choroid which gives blood and oxygen to the retina.
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- Corneal dystrophy is a degenerative eye disease caused by abnormal cellular function and development, leading to excess fluid in the cornea. The cornea is the part of the eye that covers your iris and pupil, forming the front-most part of your eyes.
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Macular Degeneration Age-related Macular Degeneration (AMD) is a progressive eye condition that damages the macula, the part of the retina responsible for central vision. Potential loss of central vision. In some cases, AMD advances so slowly that people notice little change in their vision.
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- Pavingstone (cobblestone) degeneration is characterized by peripheral, small, discrete areas of atrophy of the outer retina. Sometimes, the lesions may coalesce into a band like zone of degeneration or may occur singly. It is present in 22-27% of general population and 33% are bilateral.
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Lattice degeneration Lattice degeneration. Lattice degeneration is a thinning of the peripheral retina. This condition does not interfere with central vision or cause any symptoms, so it is often undetected unless a patient undergoes a thorough peripheral retinal exam.Lattice degeneration occurs in about 7% to 8% of the general population, and of those affected, about 45% have lattice degeneration in both eyes.This condition is often inherited and is found more commonly in people who are myopic (nearsighted).attice degeneration occurs in about 7% to 8% of the general population, and of those affected, about 45% have lattice degeneration in both eyes.
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- Medical definition of mucoid degeneration: tissue degeneration marked by conversion of cell substance into a glutinous substance like mucus tissue degeneration marked by conversion of cell substance into a glutinous substance like mucus… See the full definition
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Macular Degeneration Macular degeneration, also called age-related macular degeneration (AMD or ARMD), affects the macula, which is the central portion of the retina of the eye. Our central vision (what you see directly in front of you rather than what you see at the side [or periphery] of your vision) is dependent on a healthy macula.
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Overview Dry macular degeneration is one of two types of age-related macular degeneration. It can progress to wet (neovascular) macular degeneration, which is characterized by blood vessels that grow under the retina and leak. The dry type is more common, but it usually progresses slowly (over years).
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- Age-related Macular Degeneration (AMD) is a progressive eye condition that damages the macula, the part of the retina responsible for central vision. When the macula is damaged changes in your central vision may occur including:
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- Basically, macular degeneration occurs when age takes its toll on the macula, the area of the retina responsible for central vision sharpness. Degenerative changes take place in the blood vessels and retinal cells of the macula resulting in gradual loss of central vision. This type of macular degeneration is known as dry macular degeneration and accounts for nearly 90% of the cases. Vizu-All Plus. Maintain healthy eyes and circulatory health.
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Nonexudative (Dry) Age-Related Macular Degeneration (AMD) ARMD is the most common cause of irreversible vision loss in the developed world; this condition is associated with the presence of drusen, without visual loss early in the disease, and often progresses to retinal atrophy and central retinal degeneration with associated loss of central vision.
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- Slow but progressive, it results from the breakdown of cells in the macula, the small central part of the retina that allows a person to see fine detail. Age-related macular degeneration is a degenerative condition of the macula (the central retina).
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Nonexudative (Dry) Age-Related Macular Degeneration (AMD) Age-related macular degeneration (AMD or ARMD) is the most common cause of irreversible vision loss in the developed world. AMD is associated with the presence of drusen, without visual loss early in the disease.
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Medications for Macular Degeneration What is Macular Degeneration: Macular degeneration is a disorder that affects the macula (the central part of the retina of the eye) causing decreased visual acuity and possible loss of central vision. The following list of medications are in some way related to, or used in the treatment of this condition.
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retinitis pigmentosa a group of diseases, often hereditary, characterized by bilateral primary degeneration of the retina beginning in childhood and progressing to blindness by middle age. Clinical signs include night blindness, reduced visual fields, depigmentation of the retinal pigment epithelium, and macular degeneration.
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The Mineral graphite Graphite is a mineral composed exclusively of the element carbon. Graphite has the same chemical composition as Diamond, which is also pure carbon, but the molecular structure of Graphite and Diamond is entirely different. This causes almost opposite characteristics in their physical properties. Graphite is rather common mineral, but fine crystals are rare.
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What is Macular Degeneration? Macular Degeneration is the leading cause of vision loss, affecting more than 10 million Americans-more than cataracts and glaucoma combined. At present, Macular Degeneration is considered an incurable eye disease. Macular Degeneration is caused by the deterioration of the central portion of the retina, the inside back layer of the eye that records the images we see and sends them via the optic nerve from the eye to the brain.
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What is Macular Degeneration? Macular Degeneration. Macular Degeneration is the leading cause of vision loss, affecting more than 10 million Americans-more than cataracts and glaucoma combined. At present, Macular Degeneration is considered an incurable eye disease. Macular Degeneration is caused by the deterioration of the central portion of the retina, the inside back layer of the eye that records the images we see and sends them via the optic nerve from the eye to the brain.
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wallerian degeneration Waller, wallerian degeneration-degenerative changes in the distal segment of a peripheral nerve fiber when its continuity with its cell body is interrupted by a focal lesion.
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Many Americans Miss the Mark on Eye Diseases and Conditions. Medical Definition of Macular degeneration. Macular degeneration: An eye disease that progressively destroys the macula, the central portion of the retina, impairing central vision. Macular degeneration rarely causes total blindness because only the center of vision is affected.
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How Much Is Too Much Sun? On the general subject of how much time we should spend in the sun, as we’re approaching summer, let’s talk about summer. What do you think is a good amount of time or a bad amount of time to spend in the sun?
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What Is Age-Related Macular Degeneration? Macular degeneration is the leading cause of vision loss among older Americans, and due to the aging of the U.S. population, the number of people affected by AMD is expected to increase significantly in the years ahead.
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Stargardt Disease Stargardt Disease. From Wikipedia: “Stargardt disease, or fundus flavimaculatus, is an inherited form of juvenile macular degeneration that causes progressive vision loss usually to the point of legal blindness.targardt Disease. From Wikipedia: “Stargardt disease, or fundus flavimaculatus, is an inherited form of juvenile macular degeneration that causes progressive vision loss usually to the point of legal blindness.
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- Myxomatous degeneration is a process of the fibrous layer of an AV valve breaking down to cause mitral valve prolapse (hooding) and the spongiform layer proliferating to cause nodular thickening of the cardiac valve leaflets, most severely at their tips. Myxomatous degeneration commonly affects the mitral and tricuspid valves in dogs. Chordae tendineae are also affected by the degenerative process, making them prone to rupture. The exact cause is unknown, but in Cavalier King Charles Spaniels and Dachshunds it is an inherited trait.
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age-related macular degeneration Age-related macular degeneration (ARMD). Degeneration of the macula (the central part of the retina where the rods and cones are most dense) that leads to loss of central vision in people over 60.