Amsler Grid: Printable Eye Test Grid
An Amsler grid is a square of straight lines with a dot in the middle that eye doctors use to notice changes in central vision, such as wavy, blurry, dark or missing areas. This Amsler grid tool shows the grid on your screen scaled so each small square covers about one degree of your view at the distance you choose. Match a bank card to the outline to calibrate your screen, set the distance, cover one eye, look at the dot and click any squares where lines look bent or missing. You can also print a true size page of 20 by 20 squares, 5 mm each, to view from 30 cm. This tool is for self-checking only and does not diagnose anything. See an eye doctor if you notice a change.
Amsler Grid
An Amsler grid you can use on screen or print at true size. Scales to your viewing distance and lets you mark wavy or missing spots.
How to use the Amsler Grid
- Hold a bank card to the screen and drag the slider until the outline matches its width.
- Enter your viewing distance, then cover one eye and stare at the center dot.
- Click any squares where lines look wavy, blurry or missing, then repeat with the other eye.
- Print the true size grid if you want a paper copy, and show any changes to an eye doctor.
Features
- On-screen grid scaled to viewing distance
- Bank card calibration for true size
- Click to mark wavy or missing squares
- Printable and downloadable 10 cm grid
- Black on white or white on black
- Works fully offline in your browser
Frequently asked questions
What is an Amsler grid used for?
It is a quick home check for central vision. Eye doctors use it to watch for changes related to conditions of the macula. Lines that look wavy or missing are worth reporting.
How far should I sit from the grid?
The standard is about 30 cm (12 inches) from a 10 cm printed grid, with your reading glasses on. Each square then covers about one degree of your vision.
Why do I need to calibrate the screen?
Screens have different pixel sizes. Matching a bank card (85.6 mm wide) lets the page know how many pixels make a millimeter, so the squares are the right physical size.
Does this test diagnose an eye disease?
No. It is a self check only. If lines look bent, blurry or missing, or the change is new, contact an eye care professional promptly.
What should I do during the test?
Cover one eye, look only at the center dot and do not move your eye around. Notice whether any lines bend, blur, fade or vanish while you stare, then test the other eye.