Desk Accessories

20/20 Vision and the Big E

How has this simple vision test evolved? It is a staple in every optometrist office and we have all seen it.   The chart with the lines of letters topped with a big E was created back in 1862 by Dutch ophthalmologist Herman Snellen who developed the chart to measure visual acuity.  Dr. Snellen also came […]

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Original source: http://www.spectaculareyewear.net/2020-vision-and-the-big-e/

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