correct astigmatism

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• 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. The curve of the cornea is shaped more like an American football or a rugby ball rather… …   Medical dictionary

• Astigmatism (eye) — DiseaseDisorder infobox Name = Astigmatism ICD10 = ICD10|H|52|2|h|49 ICD9 = ICD9|367.2 Astigmatism is an optical defect, whereby vision is blurred due to the inability of the optics of the eye to focus a point object into a sharp focused image on …   Wikipedia

• optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… …   Universalium

• Refractive surgery — Refractive eye surgery is any eye surgery used to improve the refractive state of the eye and decrease or eliminate dependency on glasses or contact lenses. This can include various methods of surgical remodeling of the cornea or cataract surgery …   Wikipedia

• Astigmatic — Referring to astigmatism or a person with 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. The curve of the cornea is shaped …   Medical dictionary

• Radial keratotomy — (RK) is a refractive surgical procedure to correct myopia. Discovery The procedure was discovered by accident by Svyatoslav Fyodorov who removed glass from the eye of one of his patients who had been in an accident. A boy, who wore eyeglasses,… …   Wikipedia

• eyeglasses — Lenses set in frames to wear in front of the eyes to aid vision or correct vision defects (see ophthalmology, optometry). Their use for farsightedness and nearsightedness has been known since the late Middle Ages. In 1784 Benjamin Franklin… …   Universalium

• Televue — Tele Vue Optics is a Chester, New York based astronomical optics company known primarily for its premium brand of speciality eyepieces and apochromatic refractor telescopes.Founded in 1977 by Al Nagler, an optical engineer from The Bronx who… …   Wikipedia

• toric — /tawr ik, tor /, adj. 1. noting or pertaining to a lens with a surface forming a portion of a torus, used for eyeglasses and contact lenses that correct astigmatism. 2. a toric contact lens. [1895 1900; TOR(US) + IC] * * * …   Universalium

• Airy, Sir George Biddell — ▪ British astronomer born July 27, 1801, Alnwick, Northumberland, Eng. died Jan. 2, 1892, Greenwich, London       English scientist who was astronomer royal from 1835 to 1881.       Airy graduated from Trinity College, Cambridge, in 1823. He… …   Universalium

• cylinder — 1. A cylindrical lens. 2. A cylindrical or rodlike renal cast. 3. A cylindrical metal container for gases stored under high pressure. [G. kylindros, a roll] Bence Jones cylinders slightly irregular, relatively smooth, rod shaped or cylindroid …   Medical dictionary