To Be Read from a 20in Distance. Translucent plastic 14in x 9in eye charts. Hospital Snellen Chart - The Snellen eye chart is the familiar chart with the big letter or symbol at the top and progressively smaller letters at the bottom of the chart down to 20/20 or better. This is a chart for measuring visual acuity at a distance; how well you can see things that are far away. Snellen Chart, Ophthalmic Equipments Exporters, Ophthalmic Equipments Manufacturers
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