Grid, Amsler

A grid pattern that resembles a checkerboard utilized for examination of the eye. The patient covers one eye and stares at a black dot in the center of the grid. While staring at the dot, the patient may notice that the straight lines in the pattern appear wavy. This kind of wavy pattern on viewing the Amsler grid is abnormal. It can be an important warning sign of what is called wet age-related macular degeneration. The macula is an area in the retina that is responsible for central (straight-ahead) vision. It deteriorates most often after age 60 resulting in age-related macular degeneration (AMD). An early sign of the dangerous "wet" type of AMD is the wavy appearance of the lines on the Amsler grid. The early diagnosis of wet AMD is critical since laser surgery is urgently needed to preserve sight. The Amsler grids shown here are reduced in size; eye care specialists have full-size grids in their office and for the patient to use at home.

Medical dictionary. 2011.

Look at other dictionaries:

  • Amsler grid — The Amsler grid, used since 1945, is a grid of horizontal and vertical lines used to monitor a person s central visual field. It is a diagnostic tool that aids in the detection of visual disturbances caused by changes in the retina, particularly… …   Wikipedia

  • Amsler grid — While conducting an eye examination, the eye care professional may ask the patient to look at an Amsler grid. This grid is a pattern that resembles a checkerboard. The patient covers one eye and stares at a black dot in the center of the grid.… …   Medical dictionary

  • Amsler charts grid — Am·sler charts, grid (ahmґzlər) [Marc Amsler, Swiss ophthalmologist, 1891–1968] see under chart and grid …   Medical dictionary

  • grid — 1. A chart with horizontal and perpendicular lines for plotting curves. 2. In x ray imaging, a device formed of lead or aluminum strips for preventing scattered radiation from reaching the x ray film. [M.E. gridel, fr. L. craticula, lattice] …   Medical dictionary

  • Amsler grid — a chart usually consisting of a grid of black lines on a white background. It is used to detect and monitor problems of central vision affecting the retina, for example in macular disease, which causes a distortion of square edges in its early… …   The new mediacal dictionary

  • Amsler grid — noun a pattern of small boxes that is used for self monitoring by patients who have age related macular degeneration • Hypernyms: ↑grid …   Useful english dictionary

  • Amsler — Marc, Swiss ophthalmologist, 1891–1968. See A. chart, A. grid, A. test …   Medical dictionary

  • Marc Amsler — (born February 5, 1891 in Vevey, Switzerland; died May 3, 1968) was a professor of ophthalmology at der Zurich Eye Clinic at the University of Zurich.[1][2] He took the position as professor of ophthalmology in Zurich in 1944. His predecessor was …   Wikipedia

  • Grilla de Amsler — La grilla de Amsler, utilizada desde 1945, es una grilla (o cuadrícula) de líneas verticales y horizontales usada para monitorear o inspeccionar el campo visual de las personas. Esta grilla o cuadrícula fue desarrollada por el oftalmólogo suizo… …   Wikipedia Español

  • Macular degeneration — Classification and external resources Picture of the fundus showing intermediate age related macular degeneration. ICD 10 …   Wikipedia

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