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👁️ Astigmatism Test

Do Lines Look Blurry or Uneven? Free Vision Screening
⚡ Quick Start
➤ Sit about an arm's length (50–70 cm) from the screen, with brightness turned up and any night-mode filter off
➤ You'll test one eye at a time — cover the other eye fully with your palm, without pressing on it
➤ If you wear glasses or contacts, choose below whether you're testing with or without them
⚠ This is a screening check, not a medical diagnosis. Screen quality and viewing angle can affect results. Only an eye exam by an optometrist or ophthalmologist can diagnose astigmatism.
DO ALL LINES LOOK EQUALLY DARK?
All look the same
Some look darker
Testing without correction checks your eyes themselves. Testing with correction checks whether your current prescription is doing its job — uneven lines with correction on may mean it needs updating.
Right Eye
👁️

Look at the small circle in the center. Do all the lines look equally dark and sharp, or do some look darker, bolder, or blurrier than others?
12 1 2 3 4 5 6 7 8 9 10 11
Which direction looks the darkest or boldest? Use the clock numbers on the chart — pick the closest match.
Compare these three blocks of lines. Do they all look equally sharp, or does one look blurrier or grayer than the others?
A
B
C

Test Complete

Right Eye
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Left Eye
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What this means

With astigmatism, the eye focuses light unevenly across directions, so lines in one orientation can look darker, bolder, or blurrier than others. This check looks for that sign — it cannot measure how much astigmatism you have, and mild astigmatism is very common and often needs no correction at all.

Before drawing conclusions, check:

  • Were you viewing the screen straight-on? Looking at a monitor from an angle can make lines look uneven for everyone.
  • Was your screen clean, bright, and free of night-mode or blue-light filters?
  • Did you keep the other eye fully covered without pressing on it?

Back to Start
📊 Past Screenings
📋 Detailed Instructions

Setup: Sit about an arm's length (50–70 cm) from your screen, viewing it straight-on — not from an angle. Turn brightness up and switch off any night-mode or blue-light filter, since these change how lines render. Choose in the settings whether you're testing with or without your glasses or contacts.

Testing each eye: You'll test the right eye first, then the left. Cover the other eye completely with your palm — don't press on the eyeball, and don't just close it, since squinting changes focus.

Step 1 — Dial chart: Look at the small circle in the center of the clock-style dial. If all lines look equally dark and sharp, that's the typical result. If some lines look darker, bolder, or blurrier than others, you'll be asked which clock direction stands out — this direction relates to the axis of possible astigmatism.

Step 2 — Line blocks: Compare three blocks of parallel lines (vertical, horizontal, diagonal). If one block consistently looks blurrier or grayer than the others, that's another sign of direction-dependent focus.

Your result reports each eye separately. Uneven lines in one or both eyes suggest possible signs of astigmatism worth mentioning at an eye exam — the result cannot tell you how strong it is, and this page is for informational purposes only, not medical advice.