google.com, pub-6543759523031476, DIRECT, f08c47fec0942fa0 DID YOU KNOW? « K4M

Thursday, February 13, 2014

DID YOU KNOW?

Posted by Delin  |  at  7:19 PM No comments

The widely used eye exam chart that
starts with a giant E on top is known as the Snellen Chart, named after the Dutch opthamologist Hermann Snellen, who developed the chart in 1862.

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