#REDIRECT Macular degeneration
[[Image:Human_eye_cross-sectional_view_grayscale.png|right|thumb|175px|Human eye cross-sectional view. Courtesy National Institutes of Health National Eye Institute]] [[Image:Human_eyesight_two_children_and_ball_normal_vision.jpg|right|thumb|220px|Normal vision. Courtesy National Institutes of Health National Eye Institute]] Macular degeneration is a medical condition where the light sensing cells in the macula malfunction and over time cease to work. It is the main cause of central vision loss (blindness) in the USA today for those over the age of fifty (Americam Academy of Ophthalmology). There are two basic types of the disease: Standard Macular Degeneration (MD) and Age Related Macular Degeneration (ARMD), with ARMD being the most common form of the condition. Macular degeneration that is not age related is most commonly caused by a heredity condition. These forms are sometimes called Juvenile macular degeneration (JMD). In macular degeneration the final form results in complete blindness in the central part of the patient's vision. ==Age related macular degeneration== ARMD is further divided into a "dry," or nonexudative, form and a "wet," or exudative, form. Eighty five to ninety percent of cases are categorized as "dry" macular degeneration where fatty tissue, known as drusen, will slowly build up behind the retina. Ten to fifteen percent of cases involve the growth of abnormal blood vessels under the retina. These cases are called "wet" macular degeneration due to the leakage of blood and other fluid from behind the retina into the eye. Wet macular degeneration usually begins as the dry form. If allowed to continue without treatment it will completely destroy the macula. Medical, photodynamic, laser photocoagulation and laser treatment of wet macular degeneration are available. The success of treatment and vision preservation is facilitated by early detection([http://www.macular-degeneration.cc www.macular-degeneration.cc]). This is contemplated by home monitoring by the patients using a grid pattern called Amsler Grid test ([http://www.amsler.cc Home Amsler Color Test]). The test that is a black and white pattern to be viewed misses majority of defects ( references at www.ixm.us ) caused by the progression and therefore a more sensitive blue on yellow test pattern has recently been introduced. ==Typical Symptoms== *A grid of straight lines appears wavy and parts of the grid appear blank. *Visual acuity drastically decreasing (two levels or more) ex: 20/20 to 20/80. *Holes visible in fundus photographs. *Trouble discerning colors; specifically dark ones from dark ones and light ones from light ones. Pictures which attempt to depict the central visual loss of macular degeneration with a black spot do not really do justice to the devasting nature of the visual loss. It is not possible, for example, to read without central vision. This can be demonstrated by printing leters 6 inches high on a piece of paper and attempting to identify them while looking straight ahead and holding the paper slightly to the side. Most people find this surprisingly difficult to do. ==Juvenille macular degeneration== "Macular degeneration" is a descriptive term for any condition which leads to loss of function of the light sensitive cells at the center of the retina. Several rare hereditary conditions can lead to macular degeneration in children and adolescents. These include: *Autosomal dominant hemorrhagic macular dystrophy *Best's Disease *Doyne's honeycomb retinal dystrophy *Sorsby's Disease *Stargardt's Disease ==Research on Prevention of AMD== Recent studies suggest that Statins, a family of drugs used for reducing cholesterol levels, may be effective in prevention of AMD, and in slowing its progression. See http://bjo.bmjjournals.com/cgi/content/full/88/2/161 ==External links== * [ http://news.bbc.co.uk/2/hi/health/medical_notes/2042906.stm The disease from a European perspective ] * [ http://www.macular_degeneration.cc Blue Yellow and Blue Red test for early diagnosis ] * [ http://www.eyesight.org/ Macular Degeneration Foundation ] Diseases Ophthalmology
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Words begining with Macular_degeneration:
Macular_Degeneration
Macular_degeneration
Macular_degeneration
Macular Degeneration
#REDIRECT Macular degeneration
Macular degeneration
[[Image:Human_eye_cross-sectional_view_grayscale.png|right|thumb|175px|Human eye cross-sectional view. Courtesy National Institutes of Health National Eye Institute]] [[Image:Human_eyesight_two_children_and_ball_normal_vision.jpg|right|thumb|220px|Normal vision. Courtesy National Institutes of Health National Eye Institute]] Macular degeneration is a medical condition where the light sensing cells in the macula malfunction and over time cease to work. It is the main cause of central vision loss (blindness) in the USA today for those over the age of fifty (Americam Academy of Ophthalmology). There are two basic types of the disease: Standard Macular Degeneration (MD) and Age Related Macular Degeneration (ARMD), with ARMD being the most common form of the condition. Macular degeneration that is not age related is most commonly caused by a heredity condition. These forms are sometimes called Juvenile macular degeneration (JMD). In macular degeneration the final form results in complete blindness in the central part of the patient's vision. ==Age related macular degeneration== ARMD is further divided into a "dry," or nonexudative, form and a "wet," or exudative, form. Eighty five to ninety percent of cases are categorized as "dry" macular degeneration where fatty tissue, known as drusen, will slowly build up behind the retina. Ten to fifteen percent of cases involve the growth of abnormal blood vessels under the retina. These cases are called "wet" macular degeneration due to the leakage of blood and other fluid from behind the retina into the eye. Wet macular degeneration usually begins as the dry form. If allowed to continue without treatment it will completely destroy the macula. Medical, photodynamic, laser photocoagulation and laser treatment of wet macular degeneration are available. The success of treatment and vision preservation is facilitated by early detection([http://www.macular-degeneration.cc www.macular-degeneration.cc]). This is contemplated by home monitoring by the patients using a grid pattern called Amsler Grid test ([http://www.amsler.cc Home Amsler Color Test]). The test that is a black and white pattern to be viewed misses majority of defects ( references at www.ixm.us ) caused by the progression and therefore a more sensitive blue on yellow test pattern has recently been introduced. ==Typical Symptoms== *A grid of straight lines appears wavy and parts of the grid appear blank. *Visual acuity drastically decreasing (two levels or more) ex: 20/20 to 20/80. *Holes visible in fundus photographs. *Trouble discerning colors; specifically dark ones from dark ones and light ones from light ones. Pictures which attempt to depict the central visual loss of macular degeneration with a black spot do not really do justice to the devasting nature of the visual loss. It is not possible, for example, to read without central vision. This can be demonstrated by printing leters 6 inches high on a piece of paper and attempting to identify them while looking straight ahead and holding the paper slightly to the side. Most people find this surprisingly difficult to do. ==Juvenille macular degeneration== "Macular degeneration" is a descriptive term for any condition which leads to loss of function of the light sensitive cells at the center of the retina. Several rare hereditary conditions can lead to macular degeneration in children and adolescents. These include: *Autosomal dominant hemorrhagic macular dystrophy *Best's Disease *Doyne's honeycomb retinal dystrophy *Sorsby's Disease *Stargardt's Disease ==Research on Prevention of AMD== Recent studies suggest that Statins, a family of drugs used for reducing cholesterol levels, may be effective in prevention of AMD, and in slowing its progression. See http://bjo.bmjjournals.com/cgi/content/full/88/2/161 ==External links== * [ http://news.bbc.co.uk/2/hi/health/medical_notes/2042906.stm The disease from a European perspective ] * [ http://www.macular_degeneration.cc Blue Yellow and Blue Red test for early diagnosis ] * [ http://www.eyesight.org/ Macular Degeneration Foundation ] Diseases Ophthalmology
Macular degeneration
See other meanings of words starting from letter:
M
MA | MB | MC | MD | ME | MF | MG | MH | MI | MJ | MK | ML | MN | MO | MP | MR | MS | MT | MU | MW | MX | MY | MZ |Words begining with Macular_degeneration:
Macular_Degeneration
Macular_degeneration
Macular_degeneration
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