
	Where results make sense

Topic: Refractive Errors

Related Topics

Astigmatism

Hyperopia

Lens (optics)

Aniridia

Intraocular lens

Corrective lens

Eye

Amblyopia

Contact lenses

Visual system

Cylindrical

Anisometropia

Contact lens

Spherical

Cylinder

In the News (Wed 9 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	cornea refractive errors
		These vision disorders, called refractive errors, affect the cornea and are the most common of all vision problems in the United States.
		Refractive errors occur when the curve of the cornea is irregularly shaped, being too steep or too flat.
		Refractive errors are usually corrected by eyeglasses or contact lenses.
	www.caridon.com /cornea-refractive-errors.html (373 words)

	Eye Care - Refractive Errors (Site not responding. Last check: 2007-10-14)
		Commonly known as farsightedness, hyperopia is the refractive error in which an image of a distant object becomes focused behind the retina, either because the eyeball axis is too short, or because the refractive power of the eye is too weak.
		A variety of inheritance patterns have been observed including dominant (one gene passed from a parent with a refractive error to a child), recessive (caused by two genes, one inherited from each parent who may/may not have a refractive error), and multifactorial (combination of genes and environment).
		Refractive errors are present in a number of genetic disorders, such as Marfan syndrome and Down syndrome.
	www.driscollchildrens.org /esp/Greystone/eye/rfrctve_da.htm (578 words)

	Refractive error - Wikipedia, the free encyclopedia
		A refractive error, or refraction error, is an error in the focusing of light by the eye and a frequent reason for reduced visual acuity.
		Refractive errors are frequently categorized as spherical errors and cylindrical errors.
		Refractive errors are thought to occur due to a combination of genetic and environmental factors.
	en.wikipedia.org /wiki/Refraction_error (565 words)

	Memorial Eye Center - Refractive Errors - Myopia, Hyperopia, Presbyopia, Astigmatism (Site not responding. Last check: 2007-10-14)
		Refractive Errors are flaws in which the eye does not naturally refract (bend) light to focus properly on the retina, or more specifically, the macula.
		Refractive errors are not diseases; if an eye has a refractive error, it simply means that the eye has a normal variation in shape.
		Presbyopia is an acquired refractive error that all people experience and has no known effective prevention.
	www.memorialeyecenter.com /disordersrefractive.shtml (966 words)

	Refractive errors
		Refractive errors tend to be inherited, but there is no pattern of inheritance.
		Size of the eyeball, shape of the cornea, shape of the lens, and depth of the anterior chamber are all variables in refractive errors.
		Eye exercises are of no benefit in improving refractive errors, since they cannot alter the size of the eyeball or the refractive power of the lens.
	www.spedex.com /text/resource/documents/veb/refractive_errors.html (754 words)

	LASIK: Revolutionising correction of refractive errors - Technology - Express Healthcare Management (via CobWeb/3.1 ... (Site not responding. Last check: 2007-10-14)
		Refractive errors may be in the form of Myopia (short-sightedness), Hyperopia (long-sightedness) or Astigmatism.
		Correction of refractive errors is possible with the use of Excimer Laser, which is a class of lasers with output in the UV range of the electromagnetic spectrum.
		Besides a thorough checking of the refractive error, they are subjected to certain diagnostic tests, namely the 'Topography' test to map the surface of the cornea and the 'Pachymeter' test to measure the corneal thickness.
	www.expresshealthcaremgmt.com.cob-web.org:8888 /20050430/technology01.shtml (501 words)

	Refractive Errors
		With a refractive error such as myopia, shown above, the light rays are not bent properly to achive good focus on the retina.
		With a refractive error, there is a defect in the way light passes through the eye.
		Refractive errors usually result from a defect in the length of the eye or shape of the cornea.
	www.apagrafix.com /patiented/ExcimerLaser/RefractiveErrsExcimer.html (316 words)

	Patient Information (Site not responding. Last check: 2007-10-14)
		Ophthalmic surgeons have been performing refractive surgery for the treatment of myopia (nearsightedness), hyperopia (farsightedness), and astigmatism (irregular shaped cornea) for approximately 100 years, but the past decades have produced rapid change and growth by means of refined techniques and the emergence of laser vision surgery.
		Refractive errors exist because the curvature of the eye is mismatched to the length of the eye and light rays cannot focus properly on the retina.
		Refractive Lens Exchange (RLE) is used to treat moderate to high degrees of nearsightedness, farsightedness and patients who are not candidates for the LASIK procedure.
	www.aao.org /isrs/public/patient_information.cfm (3508 words)

	Refractive errors » Optometrists Association Australia
		The most common eye disorders are refractive errors, which mean that the image of the object a person is looking at is not focussed properly onto the retina (the light-sensitive tissue in the back of the eye).
		Refractive errors occur when there is a mismatch between the length of the eye, and its optical power.
		The exact causes of refractive errors are still being studied, but it is known that both hereditary and environmental influences can affect their development.
	www.optometrists.asn.au /eyevision/disorders/referrors (256 words)

	Refractive Errors
		The remainder have a larger degree of refractive error in the form of short-sight (myopia) or long-sight (hypermetropia), with or without a degree of astigmatism and require a refractive correction to achieve good distance vision.
		Hypermetropia occurs when the refractive components of the eye are too weak for its length with the result that light rays attempt to focus behind the retina (figure 3).
		Lenses for the correction of higher refractive errors lead to minification or magnification of the image with associated restrictions of the field of view (Ford and Stone, 1997).
	www.bsrs2000.fsnet.co.uk /new_page_8.htm (2287 words)

	Refractive Errors (Site not responding. Last check: 2007-10-14)
		These vision disorders--called refractive errors-- affect the cornea and are the most common of all vision problems in this country.
		Refractive errors occur when the curve of the cornea (the front dome-shaped window of the eye) is shaped too steep or too flat.
		Although these are safe and effective methods for treating refractive errors, refractive surgeries such as LASIK are becoming an increasingly popular option.
	drburr.homestead.com /files/px_ed--refractive_errors.htm (391 words)

	Refractive Surgeries,Refractive Eye Surgeries,Refractive Eye Surgery,Refractive Errors Surgery,Refractive Surgery ...
		In eyes with refractive errors, excimer laser because of its high level of precision, can change the shape of the cornea to change its refractive power to the desired state and thus correcting the refractive error.
		In myopia, the central part of the cornea is made flatter, and thus decreasing the refractive power of the cornea and of the eye, and thus correcting the refractive error.
		The reliability of the procedure is quite good in mild to moderate levels of refractive errors, with most of people being able to carry out their daily activities without glasses.
	www.visitech.org /refractive-surgeries.html (1072 words)

	Refractive Errors - Healthinfochannel
		Refractive errors are the most common eye disorders.
		Most people have a refractive error, but it is usually too small to affect their vision significantly.
		For the eye to see clearly, light rays must be bent, or refracted, by the cornea and the lens and focused on the retina.
	www.healthinfochannel.com /refractiveerrors/index.shtml (214 words)

	Refractive Surgery
		he most common impairment of vision is caused by errors in refraction (or focus).
		Refraction occurs when light enters the eye through the cornea and lens.
		There are three available methods to help correct refractive errors.
	www.umdnj.edu /eyeweb/faqs/refract.html (227 words)

	Refractive Errors: Myopia (Nearsighted), Hyperopia (Farsighted), Astigmatism, and Presbyopia
		Refractive Errors: Myopia (Nearsighted), Hyperopia (Farsighted), Astigmatism, and Presbyopia
		Presbyopia, a refractive disorder that comes with age, can be treated with monovision through LASIK and the placement of intraocular lens implants, among other procedures.
		LASIK surgery, PRK, and other refractive procedures correct myopia, hyperopia, and astigmatism by reshaping the cornea so that the focal point is on the retina.
	www.docshop.com /education/vision/refractive (356 words)

	Refractive Errors: Definition, Symptoms, and Treatment - Kellogg Eye Center
		A refractive error means that the shape of your eye does not bend light correctly, resulting in a blurred image.
		Light has to be refracted or bent by the cornea and the lens to the retina in order for us to see.
		Refractive disorders are commonly treated using corrective lenses, such as eyeglasses or contact lenses.
	www.kellogg.umich.edu /patientcare/conditions/refractive.errors.html (338 words)

	Refractive Errors in Children (Site not responding. Last check: 2007-10-14)
		The ophthalmologist will then advise parents whether the measured error of refraction is appropriate or expected for his or her age and whether there is a need for glasses, or whether the condition can be monitored.
		In a child who has no error of refraction (emmetropic), a significant myopia, and sometimes astigmatism, may be picked up if he or she accommodates.
		Any child with an error of refraction that is unexpectedly high for his age should wear corrective glasses.
	www.eye.com.ph /refractive_errors_in_children.htm (1912 words)

	Headaches Associated with Refractive Errors:Myth or Reality?
		Introduction: Headache and refractive errors are very common conditions in the general population, and those with headache often attribute their pain to a visual problem.
		Headache associated with refractive errors was the only headache type significantly more common in subjects with refractive errors than in controls (6.7% versus 0%).
		With adequate correction, 72.5% of the subjects with headache and refractive error reported improvement in their headaches, and 38% had complete remission of headache.
	www.headachedrugs.com /archives/refractive_errors.html (283 words)

	Refractive Errors
		Refractive errors result when light rays do not come to a focus on the retina, causing the conditions of myopia (nearsightedness), hyperopia (farsightedness), or astigmatism.
		The third is an excimer laser refractive procedure such as LASIK or LASEK/PRK which can reshape the cornea to better focus incoming light.
		These procedures are designed to decrease dependency on glasses and contact lenses for those people who have trouble with them, or feel they would benefit in their daily activities by having less dependency on glasses or contacts.
	www.vision-institute.com /refractive/index.html (278 words)

	Corrective Eye Surgery for Refractive Errors
		Called a refractive error, an abnormal cornea shape can often be corrected by refractive eye surgery, which, in turn, corrects the vision problem.
		Refractive errors can include myopia (nearsightedness), hyperopia (farsightedness), astigmatism (an irregularly shaped cornea which causes blurring), and presbyopia (similar to hyperopia, a condition which causes the lens to harden).
		The goal of most refractive eye surgeries is to reduce or eliminate a person's dependency on eyeglasses or contact lenses.
	www.healthsystem.virginia.edu /uvahealth/adult_eye/surgery.cfm (1770 words)

	Medical Dictionary: Refractive errors - WrongDiagnosis.com
		Refractive errors: Deviations from the average or standard indices of refraction of the eye through its dioptric or refractive apparatus.
		Refractive errors: Another name for Refractive Eye Disorders (or close medical condition association).
		Refractive errors: About 120 million people in the United States wear eyeglasses or contact lenses to correct nearsightedness, farsightedness, or astigmatism.
	www.wrongdiagnosis.com /medical/refractive_errors.htm (274 words)

	Refractive errors and treatment (Site not responding. Last check: 2007-10-14)
		The inability of the eye to accurately focus the rays of light coming from distance on the retina is called refractive error.
		This condition may be either because the eye is too short or long in length, or because the cornea or lens does not have the required refractive power.
		Refractive surgeries: these are increasingly becoming popular with the advent of more predictable laser treatments.
	www.health.indiamart.com /eye-care/refractive-errors-treatment.html (432 words)

	NGC - NGC Summary
		Correct symptomatic refractive errors with spectacles, contact lenses, or surgery as desired by the informed patient and as deemed appropriate by the physician.
		For patients with preoperative refractive errors ranging from 6 to 12 D, uncorrected visual acuity of 20/20 was achieved in 26% to 57% of patients, while uncorrected acuity of 20/40 was achieved in 56% to 94%.
		The use of contact lenses to correct refractive errors may not be advisable when there are significant eyelid, tear film, or ocular surface abnormalities related to keratoconjunctivitis sicca, blepharoconjunctivitis, acne rosacea, conjunctival cicatrization, corneal exposure, neurotrophic keratitis, or other corneal abnormalities.
	www.guideline.gov /summary/summary.aspx?ss=15&doc_id=3545&nbr=2771 (3456 words)

	Refractive Errors - Eye Care Associates of Greater Cincinnati, Inc.
		This condition in the human eye is known as a refractive error, because light rays are not refracting — or focusing — properly.
		This condition is a result of an eye that is too short or a cornea that lacks the necessary refractive power to focus images on the retina.
		To learn more about refractive errors — and how to treat them — make an appointment with an experienced eye doctor at Eye Care Associates of Greater Cincinnati.
	eyecarecincinnati.com /regularexams/refractive (563 words)

	Refractive Errors
		Refractive Errors are common vision problems which make it difficult to see close or distant objects clearly.
		A refractive error means that the shape of your eye doesn't refract the light properly, so that the image you see is blurred.
		You should discuss your refractive errors and your lifestyle with your ophthalmologist to decide which correction will be most effective for you.
	www.harthosp.org /eyes/conditions/refractive.htm (1177 words)

	Eye Conditions > Refractive Error -- EyeMDLink.com
		The term refractive error encompasses myopia (nearsightedness), hyperopia (farsightedness), astigmatism and presbyopia.
		These disorders of the eye are routinely corrected with glasses or contact lenses, and now, with refractive procedures such as the excimer laser assisted procedures known as LASIK and PRK, intracorneal rings, CK for hyperopia, and even intraocular lens implants (implantable contact lenses).
		Many patients who undergo a refractive surgical procedure such as LASIK will be offered monovision, i.e., a planned surgical approach in which one eye is left near-sighted to minimize dependence on reading correction during the presbyopic years.
	www.eyemdlink.com /Condition.asp?ConditionID=373 (938 words)

	Corrective Eye Surgeries for Refractive Errors
		Refractive errors can include myopia (nearsightedness), hyperopia (farsightedness), astigmatism (an irregularly shaped cornea which causes blurring), and presbyopia (similar to hyperopia, but mainly causes blurring for near or close vision tasks).
		The candidate must have a refractive error that is within the range treatable with the laser.
		Although each procedure varies slightly, in general, RK surgery involves an eye surgeon cutting (with a calibrated diamond scalpel) radial- or spoke-like incisions into the cornea outside of the center of the cornea (also called the optical zone, which is the area where a person sees through).
	medicalcenter.osu.edu /patientcare/healthinformation/diseasesandconditions/eyecare/vision/surgery (1874 words)

	Refractive Errors Correction - VisionChannel
		Most refractive errors can be corrected with eyeglasses, contact lenses, or surgery.
		The strength of a lens (i.e., its refractive power) is measured in optical units called diopters.
		To correct astigmatism, which is caused by distortions in the shape of the lens or cornea, a cylinder lens is frequently used.
	www.visionchannel.net /refractivecorrection/index.shtml (912 words)

	vision terms - refractive error
		A refractive error is a mismatch between the power of the eye’s optical system and its length.
		Hypermetropia (also known as hyperopia, or long-sightedness) occurs when the power of the relaxed eye is too low for the length of the eyeball, and light from a distant object is then focused behind the retina (or it would be if it could get there!).
		Presbyopia is not normally considered to be a ‘refractive error’ because it is a normal consequence of age, and because it is a problem of near vision rather than of distance vision.
	www-staff.lboro.ac.uk /~huph/referror.htm (708 words)

	3.5.2 Refractive errors
		The global magnitude of refractive errors is not reliably known, as there is great variation in groupings according to age, definitions of blindness, and examination methods.
		Reports suggest that 5-25% of blindness in some countries is caused by refractive errors and as much as 4% of the population sees less than 6/18 (20/60, 0.33) because of this condition.
		Large-scale screening may increase awareness of refractive errors and motivate parents and grandparents to come forward for testing as well.
	www.who.int /ncd/vision2020_actionplan/contents/3.5.2.htm (356 words)

Try your search on: Qwika (all wikis)