Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

Topic: Astigmatism (eye)

    Note: these results are not from the primary (high quality) database.

Astigmatism definition - Medical Dictionary definitions of popular medical terms Astigmatism - Astigmatism is a common form of visual impairment in which part of an image is blurred, due to an irregularity in the curvature of the front surface of the eye, the cornea. Astigmatism: A common form of visual impairment in which part of an image is blurred, due to an irregularity in the curvature of the front surface of the eye, the cornea. Astigmatism may contribute to poor school performance but is often not detected during routine eye screening in schools. www.medterms.com /script/main/art.asp?articlekey=2374   (566 words)

Astigmatism and Contact Lenses Astigmatism is caused by an eye that has two different powers, which cause a splitting of an image into two focus points. Astigmatism is a refractive condition of the eye that is caused by its shape, just like myopia (nearsight) and hyperopia (farsight). Astigmatism eyeglasses cause distortion just like those "Fun House" mirrors that make you look tall and skinny or short and fat…there is more magnification in one direction than the opposite. www.eyetoeyevisioncenter.com /astig.html   (398 words)

LaserMyEye :: Encyclopedia :: Astigmatism Astigmatism is an assymetry - lopsidedness - of the cornea (or in some cases the lens of the eye) which causes light to not focus properly on the back of the eye (retina), thereby messing up your vision in such a way that you need glasses or contact lenses. Large amounts (say more than 1.5 dioptres) of astigmatism are a serious challenge for laser eye surgery however and are associated with a lower rate of success and higher enhancement rates. As a type of refractive error, astigmatism is one of the things laser eye surgery seeks to correct. www.lasermyeye.org /encyclopedia/astigmatism.html   (213 words)

astigmatism If large amounts of astigmatism are not corrected early in life, it is possible to develop refractive amblyopia, or lazy eye. Monitoring of astigmatism is done during routine eye examinations. An individual with astigmatism has an abnormal curve in the optical part of the eye. www.northmemorial.com /healthencyclopedia/content/2359.asp   (451 words)

Encyclopedia - Astigmatism Astigmatism is a vision disorder that occurs when the cornea of the eye is uneven in shape. In those cases where the astigmatism arises from the eye's natural crystalline lens rather than the cornea, a special bitoric contact lens may be prescribed. Eyelid swelling, corneal scars, and keratoconus, a rare condition that causes the cornea to be misshapen, can also cause astigmatism. www.visionrx.com /library/enc/enc_astigmatism.asp   (566 words)

Astigmatism In a patient with an astigmatism, the cornea or sometimes the lens of the eye is curved abnormally. An astigmatism is usually present at birth, but sometimes is caused by disease or injury to the eye later in life. As the rays pass through the inner parts of the eye, the lens (transparent tissue that changes shape to help focus light rays) bends the rays still further, focusing them to a point on the retina (the membrane at the back of the eye that transmits images of external objects to the optic nerve). www.ecfimbres.com /astigmatism.htm   (313 words)

Astigmatism Astigmatism is a refractive correction where light that enters the eye is focused at two points instead of one point inside the eye. This creates two focal points in the eye and the perception of blur to the person with the astigmatism. People with astigmatism may be blurry at distance and near, whereas farsighted people are usually blurry at near and nearsighted people are usually blurry at far. www.youreyesite.com /astigmatism.htm   (289 words)

Astigmatism - What is it? Astigmatism may cause blurred vision, eye strain or even headaches. Small amounts of astigmatism may be ignored, but if any of its symptoms are present, astigmatism may be corrected by glasses or contact lenses. To illustrate what astigmatism really is, compare an egg to a ping- pong ball, or a football to a basketball. www.rochestereyedoc.com /astigmatism3.html   (239 words)

Astigmatism symptoms and treatment on MedicineNet.com Astigmatism is a common eye condition that's easily corrected by eyeglasses, contact lenses or surgery. Astigmatism can also result from pressure from the eyelids on the cornea, incorrect posture or an increased use of the eyes for close work. Another method for correcting astigmatism is by changing the shape of the cornea through refractive or laser eye surgery. www.medicinenet.com /astigmatism/article.htm   (653 words)

Astigmatism - MayoClinic.com Astigmatism occurs when the front surface of your eye (cornea) or the lens, inside your eye, has a slightly different surface curvature in one direction from the other. Astigmatism is a mild and easily treatable imperfection in the curvature of your eye. Astigmatism is often present at birth and may occur in combination with nearsightedness or farsightedness. www.mayoclinic.com /invoke.cfm?id=DS00230   (307 words)

Astigmatism - Wikipedia, the free encyclopedia Astigmatism is a refraction error of the eye in which there is a difference in degree of refraction in different meridians. Astigmatism occurs when either the cornea or the lens of the eye is not perfectly spherical. Astigmatism causes difficulties in seeing fine detail, and can be often corrected by glasses with a cylindrical lens (i.e. en.wikipedia.org /wiki/Astigmatism   (326 words)

Human eye - toric contact lenses Astigmatism is where the optical system of the eye, particularly the front surface of the cornea, has one curvature going across the eye and a different curvature at right angles to this. An eye with astigmatism does not have a single position of focus where that small distant light can be focussed as a point. Often small degrees of astigmatism can be tolerated although sometimes the additional strain in attempting to focus can result in sore eyes and headaches, which is when spectacles or contact lenses are prescribed. www.terencemendoza.co.uk /human_eye_astigmatism.htm   (326 words)

astigmatism.htm Some patients experience surgically induced astigmatism after eye surgery. Astigmatism: Objects are blurred at all distances because the shape of the cornea is not uniform. Astigmatism is a refractive error which causes blurred or distorted vision. www.medindia.net /Patients/patient_information/astigmatism.htm   (1099 words)

Astigmatism Astigmatism is not a disease nor does it mean that you have "bad eyes." It simply means that you have variation or disturbance in the shape of your cornea. Astigmatism is diagnosed through the process of comprehensive eye health examination that checks for near vision, distant vision, and clarity of vision. Astigmatism is one of a group of eye conditions known as refractive errors. www.berwickeye.com.au /limbal_relaxing_incisions.htm   (655 words)

Astigmatism and Treatments for Astigmatism - AllAboutVision.com But astigmatism may also result from an eye injury that has caused scarring on the cornea, from certain types of eye surgery, or from keratoconus, a disease that causes a gradual thinning of the cornea. Unfortunately, astigmatism can affect their ability to see well in school and during sports, so it's important to have their eyes examined at regular intervals in order to detect any astigmatism early on. Astigmatism occurs when the cornea is shaped more like an oblong football than a spherical baseball, which is the normal shape. www.allaboutvision.com /conditions/astigmatism.htm   (839 words)

Astigmatism Astigmatism means that the cornea of the eye has an irregular shape, causing vision problems. Some people with astigmatism develop eyestrain, squinting and headaches from working to focus on near or distant objects. Sometimes astigmatism can be caused by other medical conditions, particularly problems of inflammation of the eyelids. www.aetnapharmacy.com /AP/ihtAP/r.WSIHW000/st.9339/t.9495.html   (475 words)

ASTIGMATISM Astigmatism is a condition where the front surface of the eye (the cornea) is irregularly shaped and causes the vision to be distorted. Astigmatism is not a disease and often occurs with near-sightedness and far-sightedness. If necessary, astigmatic keratotomy, which is a surgical procedure, may be performed by an ophthalmologist (eye specialist) for the correction of astigmatism. www.mydr.com.au /?article=2420   (377 words)

Stigmatism - It's actually "astigmatism" - AllAboutVision.com Astigmatism (not stigmatism) can be corrected by eyeglasses, contact lenses, and laser eye surgery. Often incorrectly called "a stigmatism," it's actually one word -- astigmatism, meaning an eye that's not exactly spherical. Astigmatism is generally accompanied by either myopia (nearsightedness) or hyperopia (farsightedness). www.ronw.org /stigmatism.htm   (76 words)

Astigmatism Astigmatism is a refractive condition in which vision may be blurred, at distance as well as near, since a sharp image of the objects viewed cannot be formed on the retina or if formed, it is only at the cost of eye strain. About 90% of the eyes have at least minimal degrees of astigmatism but they need to be corrected only if they show symptoms. When the front of the eye (Cornea) is transparent and is more oval than normal it can give rise to astigmatism. www.kapleshwar.com /eyecare/astigmatism.asp   (151 words)

Astigmatism The most common surgeries used to correct astigmatism are astigmatic keratotomy (procedures that involve placing a microscopic incision on the eye) and LASIK. Astigmatism means that the cornea is oval like a football instead of spherical like a basketball. Astigmatism can be detected and measured with corneal topography, keratometry, vision testing and refraction. www.stlukeseye.com /Conditions/Astigmatism.asp   (223 words)

Amblyopia (Lazy eye) - DrGreene.com An eye that deviates, cloudiness in one eye, or any signs or symptoms of nearsightedness, farsightedness, or astigmatism might suggest that amblyopia is developing as a result. It might occur if there is unequal vision in the two eyes from astigmatism, or if one eye is more nearsighted or farsighted than the other. Usually a lazy eye should be diagnosed by age 3 in order to restore normal vision to that eye by age 6. www.drgreene.com /21_1024.html   (223 words)

Human Eye Model - Gulden Ophthalmics The Astigmatism Human Eye Model is for patient education in astigmatism, myopia and hyperopia. The human eye model is made of plastic, measures three to six inches in diameter, and is mounted on a, sturdy, opaque, plastic base. Attached to the cornea and the rear of this human eye model are two strands of thin shock cord that pass through a bead, which simulates the bending of rays of light by the lens and a focal length of the eye, in front of and behind the retina. guldenindustries.com /eyemodels.html   (223 words)

Amblyopia (Lazy eye) - DrGreene.com An eye that deviates, cloudiness in one eye, or any signs or symptoms of nearsightedness, farsightedness, or astigmatism might suggest that amblyopia is developing as a result. Usually a lazy eye should be diagnosed by age 3 in order to restore normal vision to that eye by age 6. Whatever the cause, if the “lazy” eye relaxes, the vision in that eye gets worse, and a destructive cycle begins. www.drgreene.com /21_1024.html   (223 words)

LaserSurgeryForEyes.com Astigmatism occurs when the front surface of your eye (cornea) is slightly irregular in shape, resulting in vision being blurred at all distances. Astigmatism is not a disease, but is actually a vision condition that is quite common. Astigmatism is measured in terms of diopters, cylinder meridian or axis. www.lasersurgeryforeyes.com /astigmatism.html   (668 words)

Astigmatism First let me briefly explain what astigmatism is. We see when light waves enter the eye and are focused by the cornea and lens to produce an image on the retina. Even compression of the cornea by an upper eyelid stye may cause temporary alterations in the astigmatism. Astigmatism is a condition in which light waves are not focused at one point, but rather at two separate focal points because the cornea is not spherical. healthlink.mcw.edu /article/901646470.html   (260 words)

Eye Conditions > Irregular Astigmatism -- EyeMDLink.com Regular astigmatism of significant degree may be corrected with cylinder in eyeglasses, toric soft contact lenses, or rigid gas-permeable contact lenses. Astigmatism indicates that vision is distorted by a variation in the curvature of the cornea. Irregular astigmatism frequently occurs with the following conditions: keratoconus, corneal scarring, pressure on the cornea from lid masses such as chalazia, and corneal warpage associated with contact lens wear. www.eyemdlink.com /Condition.asp?ConditionID=250   (220 words)

Refractive Errors - Astigmatism - VisionChannel A diagnosis of astigmatism can be made only after a basic eye examination performed by an ophthalmologist or an optometrist. Almost all degrees of astigmatism can be corrected with prescription eyeglasses or contact lenses. People with mild astigmatism may experience headaches, eyestrain, fatigue, or blurred vision at certain distances. www.visionchannel.net /refractiveerrors/astigmatism.shtml   (460 words)

USAEyes.org - Lenticular Astigmatism and LASIK, IntraLASIK, PRK, LASEK, Epi-LASIK, RLE, P-IOL, CK, etc Lenticular astigmatism means that the natural crystalline lens of the eye is not perfectly symmetrical front and back, but the crystalline lens is misshaped similar to the back of the spoon example. Astigmatism when applied to the cornea means that the cornea is not spherical like the top of a ball, but oblong like the back of a spoon. Astigmatism, no matter the source, causes light passing through the cornea to focus at more than one location on the retina, causing blurred vision and sometimes ghosting. www.usaeyes.org /faq/subjects/lenticular_astigmatism.htm   (614 words)

Astigmatism in children Astigmatism is a condition where the eye is shaped more like a football rather than a basketball. Also, the optometrist said that the reason he sees well without glasses is because the farsightedness and the astigmatism compensate for each other causing him to "focus on zero" or focus on the retina so that there is little bluriness, and this would be why he has not complained about not being able to see. When the optometrist discussed this condition with us, she said (something like)astigmatism causes blurriness which the brain then ignores because it cannot focus on that information, so effectively there would be blind spots. www.medhelp.org /perl6/eyecare/archive/227.html   (576 words)

Astigmatism Magic eyes vision training is a very effective way of eliminating most forms of astigmatism in children. Astigmatism is mainly caused by an unequal stress pattern held by the ey muscles. Astigmatism affect a large number of children and is usually present with other vision problems like myopia. www.magic-eyes.com /Training/Astigmatism/Astigmatism.htm   (315 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.