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.

In most modern Snellen Eye Charts, the middle bar is shorter. Vision specialists today use a version of the Snellen Eye Chart with 11 lines of letters. People are also reading… ...

At least once in your life, you must have squinted at the eye chart at the doctor’s office or DMV, trying to make out the blurry bottom line. Turns out, there’s some very precise math that ...

Two commonly used tests are Snellen and random E. Snellen. The Snellen test uses a chart of letters or symbols. You’ve probably seen the chart in a school nurse’s office or eye doctor’s office.