progressive power lens

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• Progressive lens — View through a progressive lens at some distance. In nor­mal use, a much smaller section of the glass is used, so that the dis­tortion is much smaller. Progressive spectacle lenses, also called progressive addition lenses (PAL), progressive power …   Wikipedia

• progressive lens — a multifocal eyeglass lens that provides a continuous range of focal power between near and far distances. [1975 80] * * * …   Universalium

• progressive lens — a multifocal eyeglass lens that provides a continuous range of focal power between near and far distances. [1975 80] …   Useful english dictionary

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

• omnifocal lens — a lens whose power increases continuously and regularly in a downward direction, thereby avoiding the discontinuity in field and power of a bifocal or trifocal lens. Called also progressive l …   Medical dictionary

• The Power of Nightmares — Infobox Television bgcolour = name = The Power of Nightmares caption = Title screen of The Power of Nightmares format = Documentary series runtime = 180 min. (total) creator = director = Adam Curtis producer = Adam Curtis Executive Producer… …   Wikipedia

• контактная линза с плавноменяющейся рефракцией — Линза, предназначенная для коррекции в диапазоне рефракции по полю зрения, по которому рефракция постоянно плавно меняется. [ГОСТ 28956 91] Тематики оптика очковая и офтальмологическая Обобщающие термины линзы контактные EN progressive power lens …   Справочник технического переводчика

• Eyeglass prescription — Using a phoropter to determine a prescription for eyeglasses An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist or ophthalmologist, that specifies the value of all parameters the prescriber has deemed… …   Wikipedia

• Adjustable focus — eyeglasses compensate for the effects of presbyopia, lack of focusing, by providing on demand clarity at any desired distance.Two approaches can be found in the literature: electro optical (often utilizing liquid crystals as the active medium)… …   Wikipedia

• Myopia — For other uses, see Myopia (disambiguation). Myopia Classification and external resources ICD 10 H …   Wikipedia

• radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …   Universalium