Almanac: The eye chart

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January 18, 1908, is the anniversary of the death of Dutch ophthalmologist Herman Snellen, who created the familiar test for visual acuity. Charles Osgood reports.
  1. CBS Sunday Morning
  2. eye
  3. chart
  4. doctor
  5. death
  6. dutch
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Комментарии
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Nice information about Dr Snellen ! What led him to prepare this chart which remains unaltered even now !

avimango
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good & nice video, it's so important, thanx

rpsat
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The eye should have an angle resolution of one minute of arc - for excellent eyes. Spacing, is 1' of arc, black lines.

otiebrown
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OK, on Chart.
Better?
Use Tumbling E's, on a Cell Phone, using the App by Jose.

otiebrown
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If you are interested in reducing poor eyesight at home the best info that i've ever had was with the great gazer fix (just google it) - definately the most helpful resource i've seen.

gregoryblanco