home science tools

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Home Science Tools

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This can be useful to screen children for nearsightedness, . Here you'll find a free downloadable vision chart with instructions.

Place yourself 2.8 meters (or 9 feet) away from the chart. A visual acuity test is a recording of the vision of the eye. The snellen chart (the letters in decreasing sizes) should be printed out on a4 and then placed 3 meters away from you.