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Central vision · 3–5 minutes

Do straight lines look wavy?

A guided Amsler grid check for each eye. Notice distortion, blurred lines or missing areas.

Set up before you begin

  1. Wear the glasses you normally use for reading. Use good, even lighting and avoid screen glare.
  2. Use a ruler to adjust the line below until it measures exactly 5 cm. The grid will then measure 10 cm square. Do not rely on the screen’s apparent size.
  3. Keep your eyes approximately 35 cm (14 inches) from the grid. Keep the same distance for each eye.
  4. Cover the left eye without pressing on it. Keep looking at the centre dot with the right eye. Notice the surrounding lines without moving your gaze around the grid.
  5. Then cover the right eye and repeat with the left eye.

If the whole calibrated grid does not fit, use a larger screen or print it. Recheck the line after zooming, rotating or resizing your screen.

Print at actual size / 100%, without “fit to page”. Measure the grid: it must be 10 cm square. A 5 cm verification line appears above. If the size is wrong, do not use this printout for the check.

Record what you noticed

You can report a concerning observation even if you could not confirm the grid size. For each eye, keep looking at the centre dot while observing; record your answer afterwards.

Right eye — cover your left eye
Left eye — cover your right eye
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Your privacy

These tools do not ask for your name or phone number. Answers stay in this page’s memory and are not sent to the clinic or saved by the tools. Refreshing clears them. Nothing is monitored by the clinic. A printed or saved summary remains your responsibility to keep private.

These self-checks cannot diagnose disease or replace an eye examination.

Sources and review status

Content version 1 · Clinical review confirmed 24 October 2026. Currently available in English.