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  1. Eye Chart and Vision Test Online. Calculate your visual acuity to see if it's 20/20, 20/30, 20/40, etc. Check your screen display: the top letter E (in the eye chart, below) should be almost 3 1/2 inches (88.7 millimeters) tall. The matching height is required to determine the real size reference.

  2. Visual Acuity Testing (Snellen Chart) Assess binocular and monocular visual acuity. IMPORTANT. This calculator is intended as a convenient screener for visual acuity to be used on a mobile device and should not be used as a replacement for in-office testing.

  3. 28 sty 2012 · Open the Snellen Chart image on your computer screen and measure the size of the big letter E using a ruler. Multiply that number by 2.838 and stand that far from the screen while taking the test. Now try reading the different letters, top to bottom, to check your vision.

  4. Test your visual acuity or clarity of vision with Snellen chart directly in your browser. Press on the play button and stay 10 feet (3 meters) away from the screen. Repeat the test once for each eye; for each level, you need to have at least 50% percent correct answers.

  5. A Snellen chart is used to measure the clarity of eyesight. Starting with one large letter, each row contains an increasing number of letters in decreasing size. Results of the test are shown as fraction, such as 6/6.

  6. 29 sty 2021 · For the best accuracy, have someone assist you when testing your vision with the Snellen Eye Chart. Place the chart on a wall about six metres away. Cover one eye and read aloud the letters on the chart.

  7. Eyechart.Online includes stereopsis tests, colour vision tests, contrast sensitivity tests, an interactive fan & block, image slideshows, fixation disparity tests, letter randomisation, resizable targets, phoria tests, programmable sequences, adjustable anaglyph colors and much more.

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