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Amsler Grid Vision Test
The Amsler Grid is useful for monitoring the function of the macula, or the central area of vision. Certain disorders, such as macular degeneration, can lead to distortion of the retina due to hemorrhage or swelling. This leads to distortion of the visual image perceived by that area of the retina (much like camera film that is wrinkled in the camera will give a distorted photograph). In many cases, a person can monitor their vision with an Amsler Grid to check for distortion, blind spots, or changes in previously existing abnormalities.
Some conditions that are monitored with an Amsler Grid include:
Age-related Macular Degeneration (ARMD)
Drusen (deposits) present in the macula
Ocular Histoplasmosis Syndrome (OHS or POHS)
High Myopia (nearsightedness) with retinal degeneration
Plaquenil (hydroxychloroquine) or Chloroquine use (a drug used for rheumatological
conditions)
Central Serous Choroidopathy
Cystoid Macular Edema
Many others
VIEW and PRINT the Amsler Grid here.
When printing, the following settings should be
used in the printer setup, as available:
The page should be centered vertically and horizontally.
The size of the image should be kept the same, not enlarged to fill the page.
Print as portrait, not landscape. The graphics type should be monochrome (black and white), and print resolution set to"high". The grid should be approximately 4 by 4 inches after printing. To use the grid, place it in a visible location with good lighting, such as on the refrigerator. With one's normal glasses correction for reading (reading glasses or bifocals if needed), view the grid, one eye at a time, at normal reading distance. Look at the central dot. As the dot is visualized, and without moving the eye, note whether or not there is any distortion or breaks in the lines of the grid. Also note if the dot, part of the dot, or if any of the lines disappear.
Blurred or double images might not necessarily be abnormal. The use of progressive, lineless bifocals may introduce some distortion in the grid. After one eye is checked, check the other.
The whole process may take only 10 seconds. Check the grid daily, or as often as
recommended by the treating physician.
If a change is noted on the Amsler Grid, such as new distortion or blind spots, notify
the treating ophthalmologist immediately (the same day).
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