Astigmatism is an optical defect in which vision is blurred due to the inability of the optics of the eye to focus a point object into a sharp focused image on the retina.
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 differences in curvature in the refractive surfaces (cornea and lens) of the eye. adj., adj astigmat´ic. Its exact cause is not known; some common types of astigmatism seem to run in families and may be inherited. Probably everyone has some astigmatism, since it is rare to find perfectly shaped curves in the cornea .
Astigmatism is an optical defect in which vision is blurred due to the inability of the optics of the eye to focus a point object into a sharp focused image on the retina.
Dr. Gary Heiting explains astigmatism symptoms, causes, types and correction with contact lenses and LASIK surgery. Plus, a video on astigmatism.
regular astigmatism reg·u·lar astigmatism (rěg'yə-lər) n. Astigmatism in which the curvature in each meridian is equal throughout its course, and the meridians of greatest and least curvature are at right angles to each other.
Regular astigmatism information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues.
astigmatism top: normal eye with light focusing on the retina bottom: astigmatic eye with light focusing in different places on or in front of the retina a·stig·ma·tism (É™-stÄg′mÉ™-tÄz′əm) n. A visual defect in which the unequal curvature of one or more refractive surfaces of the eye, usually the cornea, prevents light rays from focusing clearly at one point on the retina, resulting in blurred vision. [a- + Greek stigma, stigmat-, point (from stizein, stig-, to tattoo; see steig .
What causes astigmatism? How is astigmatism diagnosed? How is astigmatism treated? Astigmatism is a common vision condition that causes blurred vision.
Looking for online definition of irregular astigmatism in the Medical Dictionary? irregular astigmatism explanation free. What is irregular astigmatism? Meaning of irregular astigmatism medical term. What does irregular astigmatism mean? Irregular astigmatism . regular astigmatism; Terrien marginal degeneration; References in periodicals archive?
Regular Astigmatism is a normal and very frequent visual problem that is easily and accurately corrected with eye glasses or conventional contact lenses. Irregular Astigmatism is not normal and is
Irregular astigmatism is a type of eye disorder in which the surface of the cornea is marred by peaks, ridges, valleys, and other abnormal shapes.