Astigmatism Medical Dictionary

Astigmatism | definition of astigmatism by Medical dictionary

https://medical-dictionary.thefreedictionary.com/astigmatism

Astigmatism is an image distortion that results from an improperly shaped cornea. Usually the cornea is spherically shaped, like a baseball. However, in astigmatism the cornea is elliptically shaped, more like a football. There is a long meridian and a short meridian.

Astigmatism - Symptoms and causes - Mayo Clinic

https://www.mayoclinic.org/diseases-conditions/astigmatism/symptoms-causes/syc-20353835

What Is Astigmatism? Symptoms, Causes, …

https://www.aao.org/eye-health/diseases/what-is-astigmatism

Astigmatism is caused by a cornea or lens that has a different shape than normal. Astigmatism is very common. Doctors don't know why the shape of the cornea …

Astigmatism | National Eye Institute - National Institutes …

https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/astigmatism

Astigmatism is a common eye problem that can make your vision blurry or distorted. It happens when your cornea (the clear front layer of your eye) or lens (an …

Astigmatism Definition & Meaning - Merriam-Webster

https://www.merriam-webster.com/dictionary/astigmatism

astigmatism noun astig· ma· tism ə-ˈstig-mə-ˌti-zəm Synonyms of astigmatism 1 : a defect of an optical system (such as a lens) causing rays from a point to fail to meet in a focal …

Astigmatism - Diagnosis and treatment - Mayo Clinic

https://www.mayoclinic.org/diseases-conditions/astigmatism/diagnosis-treatment/drc-20353838

Astigmatism is diagnosed with an eye exam. A complete eye exam involves both a series of tests to check eye health and a refraction, which …

Astigmatism: Causes, Symptoms, Diagnosis, and …

https://www.webmd.com/a-to-z-guides/astigmatism-eyes

Things at a distance may look blurry and wavy. It’s common to have astigmatism along with nearsightedness (myopia) or farsightedness (hyperopia). These three conditions are …

Myopic astigmatism | definition of myopic astigmatism by …

https://medical-dictionary.thefreedictionary.com/myopic+astigmatism

astigmatism [ ah-stig´mah-tizm] an error of refraction in which a ray of light is not sharply focused on the retina, but is spread over a more or less diffuse area; it is due to …

Astigmatism - Medical Dictionary online-medical-dictionary.org

https://www.online-medical-dictionary.org/definitions-a/astigmatism.html

Astigmatism Unequal curvature of the refractive surfaces of the eye. Thus a point source of light cannot be brought to a point focus on the retina but is spread over a more or less …

Medical Definition of Astigmatism - RxList

https://www.rxlist.com/astigmatism/definition.htm

Astigmatism: A common form of visual impairment in which part of an image is blurred due to an irregularity in the dome-shaped curvature of the front surface of the …