London [UK]- On his 181st birth anniversary, search engine Google, with the help of an animated Doodle, paid special tribute to Ferdinand Monoyer, the man who invented the eye test.
The French ophthalmologist developed the diopter, a unit of measure of the optical power of a lens or curved mirror. Still in use today, it measures the distance you’d have to be from text to see it clearly.
read more- ANI
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