What is Amsler grid eye test?
The Amsler grid is a tool that eye doctors use to detect vision problems resulting from damage to the macula (the central part of the retina) or the optic nerve. The damage may be caused by macular degeneration or other eye diseases, so the Amsler grid is useful in detecting these problems.
What test is used to determine the presence of macular degeneration?
Dilated Eye Exam A dilated retinal exam allows the doctor to see a magnified view of the macula. Your healthcare provider may note a mottled appearance that is caused by pigmentary changes in the macula. Also, drusen may be observed.
How big should Amsler grid be?
The Amsler grid is a one-dimensional square, 10 cm by 10 cm, made up of many smaller boxes. Most frequently, it is a white background with black lines making up the boxes and square; however, the contrast of the grid can be increased by using a black background and white lines.
What does the beginning of macular degeneration look like?
The first sign you may notice is a gradual or sudden change in the quality of your vision or that straight lines appear distorted to you. This may gradually turn into a dramatic loss of your central vision. Other symptoms include: Dark, blurry areas or whiteout that appears in the center of your vision.
How is the Amsler grid used to test vision?
The Amsler grid is used to check whether lines look wavy or distorted, or whether areas of the visual field are missing. Tape this page at eye level where light is consistent and without glare. Put on your reading glasses and cover one eye. Fix your gaze on the center black dot.
Are there any alternatives to the Amsler grid?
The Amsler grid has been modified in a variety of ways to improve its sensitivity, including red-on-black grids, low contrast grids, and computerized grids. Alternatives to the grid test include preferential hyperacuity perimetry, macular mapping test, and noise-field campimetry.
What do distorted lines in the Amsler grid mean?
Distorted or warped lines represent metamorphopsia, while lines that disappear represent blind spots (scotomas). Keep the marked Amsler grid for later reference, as changes in the area of distortion can represent a progressive condition, stabilized condition, or improvement in your condition.
What should I do if my Amsler chart looks blurry?
While looking directly at the center dot, and observe the grid. If any lines or areas look blurry, wavy, dark or blank mark that area in chart and consult ophthalmologist. Follow the same steps with the other eye. Always remember to keep the Amsler’s Chart at the same distance from the eyes each time you test.