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 the macula(e.g. macular degeneration), as well as the optic nerve and the visual pathway to the brain.

Amsler grids can be obtained from an ophthalmologistor optometristand may be used to test one's vision at home.

The original Amsler grid was black and white. A color version with a blue and yellow grid is more sensitive and can be used to test for a wide variety of visual pathway abnormalities, including those associated with the retina, the optic nerve, and the pituitary gland.

See also

• Scotoma

External links

• http://www.amsler.cc
• Downloadable Amsler chart with instructionsfr:Grille d'Amsler

This article is licensed under the GNU Free Documentation License.
It uses material from the http://en.wikipedia.org/wiki/Amsler+grid Wikipedia article Amsler grid.