sight-testing chart

См. также в других словарях:

• eye chart — noun a chart that is read from a fixed distance; used as a test of vision • Hypernyms: ↑chart * * * noun : a chart that is read at a fixed distance for purposes of testing sight ; especially : one with rows of letters or objects of decreasing… …   Useful english dictionary

• Snellen chart — Snel·len chart snel ən n the chart used in the Snellen test with black letters of various sizes against a white background Snellen Hermann (1834 1908) Dutch ophthalmologist. Snellen was director of an eye clinic at Utrecht. In 1862 he introduced… …   Medical dictionary

• Snellen chart — the commonest chart used for testing sharpness of distant vision (see visual acuity). It consists of rows of capital letters, called test types, the letters of each row becoming smaller down the chart. The large letter at the top is of such a… …   The new mediacal dictionary

• eye chart — n a chart that is read at a fixed distance for purposes of testing sight esp one with rows of letters or objects of decreasing size …   Medical dictionary

• eye chart — noun Date: 1943 a chart read at a fixed distance for purposes of testing sight; especially one with rows of letters or objects of decreasing size …   New Collegiate Dictionary

• Phoropter — A phoropter can measure refractive error to determine an individual s spectacle lens prescription during an eye examination. A phoropter is an instrument commonly used by eye care professionals during an eye examination, containing different… …   Wikipedia

• performing arts — arts or skills that require public performance, as acting, singing, or dancing. [1945 50] * * * ▪ 2009 Introduction Music Classical.       The last vestiges of the Cold War seemed to thaw for a moment on Feb. 26, 2008, when the unfamiliar strains …   Universalium

• Area 51 — This article is about the U.S. Air Force installation in Nevada. For other uses, see Area 51 (disambiguation). Area 51 …   Wikipedia

• literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …   Universalium

• theatre — /thee euh teuhr, theeeu /, n. theater. * * * I Building or space in which performances are given before an audience. It contains an auditorium and stage. In ancient Greece, where Western theatre began (5th century BC), theatres were constructed… …   Universalium

• Medicine in medieval Islam — In the history of medicine, Islamic medicine or Arabic medicine refers to medicine developed in the medieval Islamic civilization and written in Arabic, the lingua franca of the Islamic civilization. Despite these names, a significant number of… …   Wikipedia