gas permeable hard (rigid) lens

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• 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

• 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

• 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 hard — a contact lens that maintains its shape without support and absorbs little or no water; it may be gas permeable or non–gas permeable. Called also hydrophobic contact l. and rigid contact l …   Medical dictionary

• газопроницаемая жесткая (твердая) контактная линза — Жесткая линза, которая характеризуется тем, что через материал может проходить весь или значительная часть кислорода, необходимого для метаболизма роговицы. [ГОСТ 28956 91] Тематики оптика очковая и офтальмологическая Обобщающие термины линзы… …   Справочник технического переводчика

• Keratoconus — Classification and external resources The conical cornea that is characteristic of keratoconus ICD 10 H …   Wikipedia

• 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

• LASIK — or Lasik ( laser assisted in situ keratomileusis ) is a type of refractive laser eye surgery performed by ophthalmologists for correcting myopia, hyperopia, and astigmatism. [ [http://www.intelihealth.com/IH/ihtIH/WSS/9339/32123.html LASIK. ]… …   Wikipedia

• Cornea — For other uses, see Cornea (disambiguation). Cornea Schematic diagram of the human eye. (Cornea labeled at center top.) …   Wikipedia

• Keratoconjunctivitis sicca — Classification and external resources ICD 10 H19.3 ICD 9 370.33 …   Wikipedia

• 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