simple astigmatism

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• 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

• simple hyperopic astigmatism — astigmatism in which one meridian, usually the vertical, is emmetropic and the horizontal meridian is hyperopic. The focus of the vertical meridian is not in the retina; that of the horizontal is behind the retina; horizontal lines appear… …   Medical dictionary

• 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

• simple myopia — 1. myopia due to normal growth of the healthy eyeball. It stops increasing at maturity and may be corrected to normal visual acuity. 2. myopia without astigmatism …   Medical dictionary

• myopic astigmatism simple — astigmatism in which the focus of one meridian is situated on the retina, while that of the other lies in front of the retina; vertical lines appear distinct …   Medical dictionary

• astigmatismo hipermetrópico simple — Eng. Simple hypermetropic astigmatism Variedad de astigmatismo en el que un meridiano es emétrope y el otro hipermétrope …   Diccionario de oftalmología

• astigmatismo miópico simple — Eng. Simple myopic astigmatism Variedad de astigmatismo en el que un meridiano es emétrope y el otro miope …   Diccionario de oftalmología

• Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra …   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

• Laser beam profiler — A laser beam profiler captures, displays, and records the spatial intensity profile of a laser beam at a particular plane transverse to the beam propagation path. Since there are many types of lasers ultraviolet, visible, infrared, continuous… …   Wikipedia

• microscope — /muy kreuh skohp /, n. 1. an optical instrument having a magnifying lens or a combination of lenses for inspecting objects too small to be seen or too small to be seen distinctly and in detail by the unaided eye. 2. (cap.) Astron. the… …   Universalium