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hard lenses

См. также в других словарях:

  • hard lens — a contact lens of rigid plastic or silicon, exerting light pressure on the cornea of the eye, used for correcting various vision problems including astigmatism. Cf. soft lens. * * * hard lens, a contact lens made firm plastic that adheres to the… …   Useful english dictionary

  • hard contact lenses — small non permeable plastic lenses worn on the eye for correcting vision …   English contemporary dictionary

  • contact lenses — lenses worn directly against the eye, separated from it only by a film of tear fluid. Corneal microlenses cover only the cornea, while haptic lenses cover some of the surrounding sclera as well. Contact lenses are used mainly in place of glasses… …   Medical dictionary

  • contact lenses — lenses worn directly against the eye, separated from it only by a film of tear fluid. Corneal microlenses cover only the cornea, while haptic lenses cover some of the surrounding sclera as well. Contact lenses are used mainly in place of glasses …   The new mediacal 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

  • contact lens — one of a pair of small plastic disks that are held in place over the cornea by surface tension and correct vision defects inconspicuously. Cf. hard lens, intraocular lens, soft lens. [1885 90] * * * Thin artificial lens worn on the surface of the …   Universalium

  • eye disease — Introduction  any of the diseases or disorders that affect the human eye (eye, human).       This article briefly describes the more common diseases of the eye and its associated structures, the methods used in examination and diagnosis, and the… …   Universalium

  • Bausch & Lomb — Infobox Company company name = Bausch Lomb Inc. company company type = Private foundation = 1853 location = Rochester, New York, USA key people = Ronald L. Zarrella, Chairman CEO Efrain Rivera, CFO John Jacob Bausch, Co Founder Henry Lomb, Co… …   Wikipedia

  • Rigid gas permeable — lenses are rigid contact lenses made of oxygen permeable polymers. Initially developed in the late 1970s, and through the 1980s and 1990s, they were an improvement over prior hard lenses that restricted oxygen transmission to the eye. Rigid… …   Wikipedia

  • spectacle — n 1. picture, vision, sight, panorama, phantasmagoria; show, showing, display, exhibition, scene; phenomenon, event, incident, curiosity; wonder, marvel, prodigy, revelation, sign; sensation, splash. 2. demonstration, presentation, exhibit,… …   A Note on the Style of the synonym finder

  • overwear syndrome — extreme photophobia, pain, and lacrimation associated with contact lenses, particularly non–gas permeable hard lenses, usually caused by wearing them excessively. Prolonged lens induced corneal hypoxia results in corneal epithelial edema and… …   Medical dictionary

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