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| This glossary contains: 19186 medical terms |
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LASIK
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LASIK LASIK (Laser in-Situ Keratomileusis) combines the precision of the excimer laser delivery system with the benefits of Lamellar Keratoplasty (LK) which has been proven to treat a wide range of refractive errors. Using the accuracy and precision of the excimer laser, LASIK changes the shape of the cornea to improve the way light is focused or "refracted" by the eye. First, a thin corneal flap is created, as an instrument called a microkeratome glides across the cornea. Then, in just seconds, ultraviolet light and high energy pulses from the excimer laser reshape the internal cornea with accuracy up to 0.25 microns. By adjusting the pattern of the laser beam, it is possible to treat high levels of nearsightedness and moderate amounts of farsightedness and astigmatism.
RELATED TERMS--------------------------------------
LASIK
LASIK (Laser in-Situ Keratomileusis) combines the precision of the excimer laser delivery system with the benefits of Lamellar Keratoplasty (LK) which has been proven to treat a wide range of refractive errors. Using the accuracy and precision of the excimer laser, LASIK changes the shape of the cornea to improve the way light is focused or "refracted" by the eye. First, a thin corneal flap is created, as an instrument called a microkeratome glides across the cornea. Then, in just seconds, ultraviolet light and high energy pulses from the excimer laser reshape the internal cornea with accuracy up to 0.25 microns. By adjusting the pattern of the laser beam, it is possible to treat high levels of nearsightedness and moderate amounts of farsightedness and astigmatism.
Laser
An acronym of light amplification by stimulated emission of radiation. A surgical tool that creates intense heat and power when focused at close range, destroying cells by vaporizing them.
Delivery
See drug delivery.
Keratoplasty
A corneal transplant.
Cornea
The front part of the eye that acts as a window for the entrance of light rays. It is attached to the other outer coat of the eye, the sclera; the white part of the eye. The cornea provides a significant amount of focusing power for the eye (the rest is provided by the lens). Because it has many nerve fibers, an injury or foreign body causes significant pain and discomfort.
Eye
The organ of sight. The eye has a number of components. These components include but are not limited to the cornea, iris, pupil, lens, retina, macula, optic nerve, choroid and vitreous.
Corneal
Pertaining to the cornea, the clear front window of the eye that transmits and focuses light into the eye.
Flap
A gene that helps make a leukotriene, a signal that activates the white blood cells involved in inflammation. FLAP stands for 5-lipoxygenase-activating protein. FLAP has been implicated in a number of inflammatory responses, including asthma, arthritis, psoriasis, heart attack and stroke. FLAP was the first gene discovered to be a major risk factor for the common form of heart attack and the second major genetic factor identified in the common form of stroke. Also known, confusingly, as 5-lipoxygenase activating protein, five-lipoxygenase-activating protein, five-lipoxygenase activating protein, arachidonate 5-lipoxygenase-activating protein, arachidonate 5-lipoxygenase activating protein, and ALOX5AP.
Nearsightedness
Focusing defect in which the eye is overpowered. Light rays coming from a distant object are brought to focus before reaching the retina. Requires a minus lens correction to "weaken" the eye optically and permit clear distance vision.
Farsightedness
Hyperopia occurs when the eyeball is too short from front to back, or the eye's focusing mechanism is too weak, causing light rays to be focused behind, rather than on the retina. People with hyperopia have difficulty seeing objects close up.
Astigmatism
Astigmatism is caused by an uneven or asymmetrical curvature of the cornea, which prevents the eye from focusing clearly at any distance. Astigmatism causes certain amounts of distortion or pitched images because of the uneven bending of the light rays entering the eye.
SIMILAR TERMS--------------------------------------
Lasix
Lasix is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): furosemide.
PREVIOUS AND NEXT TERMS--------------------------------------
Lotensin
Used in the treatment of hypertension, this medication consists of benazepril hydrochloride and hydrochlorothiazide.
Ludiomil
A tetracyclic anti-depressant made by Novartis.
Levitra
Levitra, based in vardenafil, is Bayer's selective product for the treatment of erectile dysfunction.
Lacrimal gland
The tear gland located under the upper eyelid at the outer corner of the eye. The fluid it secretes cleans and provides moisture for the cornea. It is responsible for tearing during emotional stimulation or following corneal irritation by a foreign body or chemical.
Lacrimal sac
The tear sac located on the side of the nose adjacent to the inner corner of the eye. Tears normally drain from the eye into the tear duct and then through the sac, finally leaving by a drain which enters the nose. The tear sac remains filled with tears when an infant has a blocked tear duct. An infection of the tear sac is called a dacryocystitis.
LASIK
Lazy eye
A term often used instead of amblyopia. A loss of visual function, usually measured by visual acuity, in one or both eyes that cannot be explained by identifiable causes(s) such as a cataract or retinal disease. An eye that turns in (esotropia) or out (exotropia) may have a certain degree of central visual loss (amblyopia). A lazy eye is often treated by placing a patch over the stronger eye and forcing use of the lazy eye. The earlier the detection of the lazy eye the better for recovery of central vision with patching. If left untreated, after the age of about 8 or 9 years, patching therapy is no longer effective and the child will have a permanent loss of vision and loss of binocular vision and depth perception.
Lens
The lens of the eye is like an adjustable lens of a camera and focuses light rays on to the retina for sharp images. A condition called presbyopia occurs when the lens is no longer able to adjust for objects at different distances.
Lens capsule
The lens capsule is a membrane that surrounds the lens of the eye. In cataract surgery, the lens is usually replaced with an intraocular lens but the lens capsule remains in the eye.
Levomepromazine
An antipsychotic drug.
Legionnaire disease
An acute, sometimes fatal, pneumonia-like bacterial infection characterized by high fever, malaise, muscle aches, respiratory disorders and headache. It is named for an outbreak at the 1976 Philadelphia convention of the American Legion
RELATED TERMS--------------------------------------
LASIK
LASIK (Laser in-Situ Keratomileusis) combines the precision of the excimer laser delivery system with the benefits of Lamellar Keratoplasty (LK) which has been proven to treat a wide range of refractive errors. Using the accuracy and precision of the excimer laser, LASIK changes the shape of the cornea to improve the way light is focused or "refracted" by the eye. First, a thin corneal flap is created, as an instrument called a microkeratome glides across the cornea. Then, in just seconds, ultraviolet light and high energy pulses from the excimer laser reshape the internal cornea with accuracy up to 0.25 microns. By adjusting the pattern of the laser beam, it is possible to treat high levels of nearsightedness and moderate amounts of farsightedness and astigmatism.
Laser
An acronym of light amplification by stimulated emission of radiation. A surgical tool that creates intense heat and power when focused at close range, destroying cells by vaporizing them.
Delivery
See drug delivery.
Keratoplasty
A corneal transplant.
Cornea
The front part of the eye that acts as a window for the entrance of light rays. It is attached to the other outer coat of the eye, the sclera; the white part of the eye. The cornea provides a significant amount of focusing power for the eye (the rest is provided by the lens). Because it has many nerve fibers, an injury or foreign body causes significant pain and discomfort.
Eye
The organ of sight. The eye has a number of components. These components include but are not limited to the cornea, iris, pupil, lens, retina, macula, optic nerve, choroid and vitreous.
Corneal
Pertaining to the cornea, the clear front window of the eye that transmits and focuses light into the eye.
Flap
A gene that helps make a leukotriene, a signal that activates the white blood cells involved in inflammation. FLAP stands for 5-lipoxygenase-activating protein. FLAP has been implicated in a number of inflammatory responses, including asthma, arthritis, psoriasis, heart attack and stroke. FLAP was the first gene discovered to be a major risk factor for the common form of heart attack and the second major genetic factor identified in the common form of stroke. Also known, confusingly, as 5-lipoxygenase activating protein, five-lipoxygenase-activating protein, five-lipoxygenase activating protein, arachidonate 5-lipoxygenase-activating protein, arachidonate 5-lipoxygenase activating protein, and ALOX5AP.
Nearsightedness
Focusing defect in which the eye is overpowered. Light rays coming from a distant object are brought to focus before reaching the retina. Requires a minus lens correction to "weaken" the eye optically and permit clear distance vision.
Farsightedness
Hyperopia occurs when the eyeball is too short from front to back, or the eye's focusing mechanism is too weak, causing light rays to be focused behind, rather than on the retina. People with hyperopia have difficulty seeing objects close up.
Astigmatism
Astigmatism is caused by an uneven or asymmetrical curvature of the cornea, which prevents the eye from focusing clearly at any distance. Astigmatism causes certain amounts of distortion or pitched images because of the uneven bending of the light rays entering the eye.
SIMILAR TERMS--------------------------------------
Lasix
Lasix is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): furosemide.
PREVIOUS AND NEXT TERMS--------------------------------------
Lotensin
Used in the treatment of hypertension, this medication consists of benazepril hydrochloride and hydrochlorothiazide.
Ludiomil
A tetracyclic anti-depressant made by Novartis.
Levitra
Levitra, based in vardenafil, is Bayer's selective product for the treatment of erectile dysfunction.
Lacrimal gland
The tear gland located under the upper eyelid at the outer corner of the eye. The fluid it secretes cleans and provides moisture for the cornea. It is responsible for tearing during emotional stimulation or following corneal irritation by a foreign body or chemical.
Lacrimal sac
The tear sac located on the side of the nose adjacent to the inner corner of the eye. Tears normally drain from the eye into the tear duct and then through the sac, finally leaving by a drain which enters the nose. The tear sac remains filled with tears when an infant has a blocked tear duct. An infection of the tear sac is called a dacryocystitis.
LASIK
Lazy eye
A term often used instead of amblyopia. A loss of visual function, usually measured by visual acuity, in one or both eyes that cannot be explained by identifiable causes(s) such as a cataract or retinal disease. An eye that turns in (esotropia) or out (exotropia) may have a certain degree of central visual loss (amblyopia). A lazy eye is often treated by placing a patch over the stronger eye and forcing use of the lazy eye. The earlier the detection of the lazy eye the better for recovery of central vision with patching. If left untreated, after the age of about 8 or 9 years, patching therapy is no longer effective and the child will have a permanent loss of vision and loss of binocular vision and depth perception.
Lens
The lens of the eye is like an adjustable lens of a camera and focuses light rays on to the retina for sharp images. A condition called presbyopia occurs when the lens is no longer able to adjust for objects at different distances.
Lens capsule
The lens capsule is a membrane that surrounds the lens of the eye. In cataract surgery, the lens is usually replaced with an intraocular lens but the lens capsule remains in the eye.
Levomepromazine
An antipsychotic drug.
Legionnaire disease
An acute, sometimes fatal, pneumonia-like bacterial infection characterized by high fever, malaise, muscle aches, respiratory disorders and headache. It is named for an outbreak at the 1976 Philadelphia convention of the American Legion
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This dictionary contains 19186 terms.
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