Almanac: The eye chart 01:48. And now a page from our "Sunday Morning" Almanac, January 18th, 1908, 107 years ago today . . . the day the Dutch ophthalmologist Herman Snellen died at the age of 73.

This eye test chart was first invented by Ferdinand Monoyer, a French opthalmologist, or eye doctor, who would have been 181 years old today. Who was Ferdinand Monoyer?

A perfect 20/20 score on an eye chart test doesn't mean you have perfect vision: Visual acuity, along with color, contrast, and depth perception, are all important parts of healthy eyesight.

Eye doctor Herman Snellen (Dutch, 1834–1908) developed the most commonly used eye chart in the 1860s. The now iconic Snellen chart contains 11 rows of capital letters decreasing in size as the eye ...

The Landolt C eye chart is similar with rows of the letter C, and the tested person indicates in which direction the gap is facing. The Landolt Chart came out in 1888.

In the doodle, viewers can see a pair of cat-eye frames with an eye chart in the background. The eye chart also contains the words "Happy 116th Birthday Altina Schinasi!" Altina's legacy will ...