he has astigmatism

См. также в других словарях:

• astigmatism — [[t]əstɪ̱gmətɪzəm[/t]] N UNCOUNT If someone has astigmatism, the front of their eye has a slightly irregular shape, so they cannot see properly …   English 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

• Astigmatism — An optical system with astigmatism is one where rays that propagate in two perpendicular planes have different foci. If an optical system with astigmatism is used to form an image of a cross, the vertical and horizontal lines will be in sharp… …   Wikipedia

• 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

• Contact lens — Contacts redirects here. For the software application, see Address book. A pair of contact lenses, positioned with the concave side facing upward …   Wikipedia

• Refractive error — Refraction error Classification and external resources ICD 10 H52.0 H52.4 ICD 9 …   Wikipedia

• Cody Martin — The Suite Life of Zack Cody and The Suite Life on Deck character Cody in Bon Voyage First appearan …   Wikipedia

• astigmatic — astigmatically, adv. /as tig mat ik/, Ophthalm. adj. 1. pertaining to, exhibiting, or correcting astigmatism. n. 2. a person who has astigmatism. [1840 50; A 6 + STIGMATIC] * * * …   Universalium

• Optical power — For the power of light, see Radiant flux and Luminous flux. Optical power (also referred to as dioptric power, refractive power, focusing power, or convergence power) is the degree to which a lens, mirror, or other optical system converges or… …   Wikipedia

• Corrective lens — A bifocal corrective eyeglass lens A pair of contact le …   Wikipedia

• Optical aberration — v · d · e Optical aberration …   Wikipedia