Hermann Snellen

Dutch ophthalmologist (1834-1908) · Netherlands · On the map · Doctors · Died at 73

Herman Snellen was a Dutch ophthalmologist who in 1862 introduced the Snellen chart to study visual acuity. He took over directorship of the Netherlands Hospital for Eye Patients, after Franciscus Donders. He was elected an International Member of the American Philosophical Society in 1894.

Hermann Snellen is read about 21 times a day, in 20 languages.

A typical day, 30 days to 15 October 2026

The middle day of the days counted, so one week of news cannot move it. The line under it is the last 86 days, one point a day.

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