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, Epiretinal membrane), as well as the optic nerve and the visual pathway to the brain.
In the test, the person looks with each
eyeseparately at the little dot in the center of the grid. Patients may notice that they don't see the lines as straight, or lines are missing,...
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.
* [http://www.mdsupport.org/eyetests.html Free self-administered eye tests online] Amsler grid, visual field mapping and Snellen eye chart
* [http://www.amdsupport.ca/articles/78/1/Age-Related-Macular-Degeneration-The-Amsler-Grid-Test/Page1.html Free Amsler Test Online]
* [http://www.myvisiontest.com/ MyVisionTest] A free modern Amsler Grid test for macular degeneration
* [http://www.stlukeseye.com/eyeq/Amsler.asp Downloadable Amsler chart with instructions]
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