nuclear cataract definition
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Cataracts Cataract, nuclear: A clouding of the lens that occurs only in the nucleus, in which case the term nuclear cataract or nuclear sclerosis is used. See: Cataract.
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cortical cataract nuclear cataract. one involving the nucleus of the lens; the common form of congenital cataracts. nuclear Y cataract. a form of congenital cataract in which small opacities outline the Y suture of the nucleus. nutritional cataract. see galactosemia.
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Eye health guide Cataracts are cloudy areas that develop within the eye lens. A healthy lens is clear like a camera's, and light has no problem passing through it to the retina at the back where images are processed. When you have a cataract, the light can't get through as easily and, as a result, you can't see as well. Cataracts often form slowly, and they don't cause symptoms like pain, redness, or tearing in the eye. Some stay small and don't affect your eyesight.
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Cataracts in Children, Congenital and Acquired Disease Entity. A cataract is any light scattering opacity of the lens. It is estimated that congenital cataracts are responsible for 5% to 20% of blindness in children worldwide. Incidence varies from country to country.
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Top 30 Doctor insights on: Prominent Cortical Sulci Sparing the nucleus: Cortical cataracts are in a layer of the lens outside of the nucleus which is the center of the lens. They are sometimes congenital. Depending upon the density they may disturb the vision but sometimes are thin enough not to be a problem.
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Cataract A cataract is a clouding of the lens in the eye leading to a decrease in vision. It can affect one or both eyes. Often it develops slowly. Symptoms may include faded colors, blurry vision, halos around light, trouble with bright lights, and trouble seeing at night.
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Overview Cataracts generally develop in both eyes, but not evenly. The cataract in one eye may be more advanced than the other, causing a difference in vision between eyes. Types of cataracts. Cataract types include: Cataracts affecting the center of the lens (nuclear cataracts). A nuclear cataract may at first cause more nearsightedness or even a temporary improvement in your reading vision. But with time, the lens gradually turns more densely yellow and further clouds your vision. As the cataract slowly progresses, the lens may even turn brown.
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Cataract removal Cataract removal is surgery to remove a clouded lens (cataract) from the eye. Cataracts are removed to help you see better. The procedure almost always includes placing an artificial lens (IOL) in the eye.
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Cortical Cataracts Cortical Cataracts Go to Academy Store Learn more and Purchase. In contrast to nuclear cataracts, cortical cataracts are associated with the local disruption of the structure of mature fiber cells. Once membrane integrity is compromised, essential metabolites are lost from the affected cells. This loss leads to extensive protein oxidation and precipitation.
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electron capture n. 1. (Nuclear Physics) physics. a. the transformation of an atomic nucleus in which an electron from the atom is spontaneously absorbed into the nucleus. A proton is changed into a neutron, thereby reducing the atomic number by 1.A neutrino is emitted.. (Nuclear Physics) physics. a. the transformation of an atomic nucleus in which an electron from the atom is spontaneously absorbed into the nucleus. A proton is changed into a neutron, thereby reducing the atomic number by 1. A neutrino is emitted.
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Cataract A cataract is a clouding of the normally clear, transparent lens of the eye. A cataract is not a tumor or growth of new tissue over or in the eye. Rather it is a fogging and loss of clarity of the lens itself. The lens is located in the eye just behind the iris and the pupil. Light entering the eye is focused by the lens onto the retina. When a cataract forms, the lens is no longer able to focus the light clearly. Therefore, your vision becomes cloudy. An early cataract may cause few problems with vision.
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Cataract Cataract is a normal age related condition that causes a gradual cloudy or misty change to the lens of the eye. The lens is a clear transparent structure located behind the iris and the pupil. The clouding and misty change to the lens prevents light from reaching the retina, thus affecting vision.
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- adj., adj catarac´tous. Causes and Symptoms. Some cataracts result from injuries to the eye, exposure to great heat or radiation, or inherited factors. The great majority, however, are “senile” cataracts, which are apparently a part of the aging process of the human body. Blurred and dimmed vision are often the first symptoms.
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Cataract & Lens Options Cataracts that affect the center of the lens (nuclear cataracts). A nuclear cataract may at first cause you to become more nearsighted or even experience a temporary improvement in your reading vision.
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- Freebase(0.00 / 0 votes)Rate this definition: Nuclear sclerosis. Nuclear sclerosis is an age-related change in the density of the crystalline lens nucleus that occurs in all older animals. It is caused by compression of older lens fibers in the nucleus by new fiber formation. The denser construction of the nucleus causes it to scatter light.
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Overview Cataract types include: Cataracts that affect the center of the lens (nuclear cataracts). A nuclear cataract may at first cause you to become more nearsighted or even experience a temporary improvement in your reading vision. But with time, the lens gradually turns more densely yellow and further clouds your vision.ome cataracts are related to inherited genetic disorders that cause other health problems and increase your risk of cataracts. Cataracts can also be caused by other eye conditions, medical conditions such as diabetes, trauma or past eye surgery. Long-term use of steroid medications, too, can cause cataracts to develop.
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Definitions &Translations Nuclear sclerosis is an age-related change in the density of the crystalline lens nucleus that occurs in all older animals.
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Overview Definition. A cataract is a clouding of the normally clear lens of your eye. For people who have cataracts, seeing through cloudy lenses is a bit like looking through a frosty or fogged-up window. cataract is a clouding of the normally clear lens of your eye. For people who have cataracts, seeing through cloudy lenses is a bit like looking through a frosty or fogged-up window.
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- Definition Phacoemulsification cataract surgery is a procedure in which an ultrasonic device is used to break up and then remove a cloudy lens, or cataract, from the eye to improve vision. The insertion of an intraocular lens (IOL) usually immediately follows phacoemulsification.
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Nuclear pore complex Nuclear pore complex. Home » Nuclear pore complex. Definition. noun. A large complex of nucleoporins resulting in the formation of nuclear pore in nuclear envelope. Supplement. Nuclear pore complex (about 120 nm in diameter) is made of nucleoproteins that assemble and span the nuclear envelope, thus creating an octagonal nuclear pore.
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- A cataract is an opacity or cloudiness in the crystalline lens of the eye, blocking the passage of light through the lens, sometimes resulting in blurred or impaired vision.A conventional IOL is a small, lightweight, clear disk that replaces the focusing power of the eye’s natural crystalline lens.
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- At 1.5GB for a two-hour standard-definition movie (the approximate size given by the iTunes store), the hard drive could (in theory) store 10,240 two-hour movies. That's 853 days, or two years and four months. For HD video, around 4.5GB for two hours, 15.36TB equates to 3,413 movies, or 284 days of footage.
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Tumor Markers Cataract and type of cataract were graded from digital lens images using the Lens Opacity Classification System HI ( LOCS ID ) , and cataract was classified from the grade in the worse eye of [ greater than or equal to ] 4 for nuclear cataract , [ greater than or equal to ] 3 for cortical cataract , and [ greater than or equal to ] 2 for posterior ...
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cataract cataract. CATARACT: (Courtesy of Christine Chung, MD). An opacity of the lens of the eye, usually occurring as a result of aging, trauma, endocrine or metabolic disease, intraocular disease, or as a side effect of the use of tobacco or certain medications, e.g., steroids. Cataracts are the most common cause of blindness in adults.
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How a Sonnet Made a Statue the âMother of Exilesâ Emma Lazarus’s poem only belatedly became synonymous with the Statute of Liberty, whose 125th birthday as a gift from France will be celebrated on Friday by the National Park Service.
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Cataracts Understanding Cataracts. A cataract is a clouding of the lens in your eye. Your lens sits just behind your iris, the coloured part of your eye. Normally your lens is clear and helps to focus the light entering your eye. Developing cataracts will cause your sight to become cloudy and misty. Cataracts can affect one or both eyes.