Amsler grid self-check

About this calculator

The Amsler grid is a simple way to watch for changes in central vision, such as straight lines looking wavy. Check one eye at a time, tap the squares that look wrong, and print the result to bring to your eye doctor.

What you need

• Your reading glasses, if you use them
• A steady reading distance of about 35 cm (14 inches)

How it is calculated

The grid has 20 × 20 squares around a central dot. The tool counts the squares you mark for each eye; it does not measure or diagnose anything. Marks stay only in this browser tab and are cleared when you close the page.

What the result can and cannot tell you

If wavy, blurry or missing areas are new, or worse than last time, contact your eye doctor promptly. This is a self-check, not an eye exam, and it cannot rule out eye disease. Marks stay only in this browser tab.

References

1. American Macular Degeneration Foundation: Amsler grid
2. Netra Eye Institute: Macular degeneration

Related

• OCT macular thickness change
• Geographic atrophy growth
• Ellipsoid zone width change
• Macular degeneration guide
• All eye calculators

For information only. These tools explain numbers and do not replace an eye examination or your eye doctor’s advice. Values you enter stay in your browser.