Munson Health
 
Astigmatism

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by Haughton AN
 

Risk Factors

A risk factor is something that increases your chance of getting a disease or condition.
The following factors increase your chances of developing astigmatism. If you have any of these risk factors, tell your doctor:
 

Treatment

There are several treatment options for astigmatism. If you suspect you have astigmatism, contact your doctor.Talk with your doctor about the best treatment plan for you. Treatment options include the following:

Corrective Lenses

Corrective lenses, such as glasses or toric contact lens, are prescribed to offset the eye’s visual abnormalities or defects, such as excessive nearsightedness, farsightedness, or astigmatism.

Surgery

To correct severe astigmatism, an ophthalmologist might use special knives or a laser beam to correct the abnormal or irregular curve of the cornea. The surgery is an outpatient procedure (does not require a hospital stay) that is performed with local anesthesia.
There are three types of surgical procedures that an ophthalmologist might perform:
  • Photorefractive keratectomy (PRK)
    • Laser beams are used to reshape the abnormal or irregular curve of the cornea.
    • Laser in situ Keratomileusis (LASIK) (a type of PRK)—laser beam to reshape the curve of the cornea by removing corneal tissue.
  • Radical keratotomy (RK)—Small incisions (cuts) are made partial thickness into the cornea.
  • Laser-assisted subepithelial Keratomileusis (LASEK)—This procedure is not as commonly used; however, it may offer additional benefits especially for patients with thin corneas or at high risk of an eye injury.
There are risk factors associated with all surgery. To choose the best surgical treatment option for your condition, it is important that you speak with your doctor about potential risks and side effects.
 

RESOURCES

American Optometric Association
http://www.aoa.org

Astigmatism
Mayo Clinic
http://www.mayoclinic.com/health/astigmatism/DS00230/DSECTION=3

National Eye Institute (NEI)
http://www.nei.nih.gov

Prevent Blindness America
http://www.preventblindness.org

 

CANADIAN RESOURCES

Canadian Ophthalmological Society
http://www.eyesite.ca

The Canadian National Institute for the Blind
http://www.cnib.ca

 

References


Condon PI, Mulhern M, Fulcher T, et al. Laser intrastromal keratomileusis for high myopia and myopic astigmatism. Br J Ophthalmol . 1997;81(3):199-206.


Goss DA. Refractive error changes in mixed astigmatism. Ophthalmic Physiol Opt . 1999;19(5):438-40.


Holladay JT, Moran JR, Kezirian GM. Analysis of aggregate surgically induced refractive change, prediction error, and intraocular astigmatism. J Cataract Refract Surg . 2001;27(1):61-79.


Komaroff AL, ed. Harvard Medical School Family Health Guide . New York, NY: Simon and Schuster; 1999:423-425.


Kymionis GD, Aslanides M, Khoury AN, et al. Laser in situ keratomileusis for residual hyperopic astigmatism after conductive keratoplasty. J Refract Surg . 2004;20(3):276-8.


Miller JM, Dobson V, Harvey EM, et al. Comparison of preschool vision screening methods in a population with a high prevalence of astigmatism. Invest Ophthalmol Vis Sci . 2001;42(5):917-24.


Pesudovs K. Autorefraction as an outcome measure of laser in situ keratomileusis. J Cataract Refract Surg . 2004;30(9):1921-8.


Taneri S, Feit R, Azar DT. Safety, efficacy, and stability indices of LASEK correction in moderate myopia and astigmatism. J Cataract Refract Surg . 2004 Oct;30(10):2130-7.


Tobaigy FM, Ghanem RC, Sayegh RR, Hallak JA, Azar DT. A Control-matched comparison of laser epithelial keratomileusis and laser in situ keratomileusis for low to moderate myopia. Am J Ophthalmol . 2006 Dec;142(6):901-908. Epub 2006 Sep 8.


Varley GA, Huang D, Rapuano CJ, et al. LASIK for hyperopia, hyperopic astigmatism, and mixed astigmatism: a report by the American Academy of Ophthalmology. Ophthalmology . 2004;111(8):1604-17.

 

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