Usually, you will look at an eye chart that has letters of various sizes on it that get progressively smaller. You'll be asked to read the letters, numbers, or figures. Distance visual acuity is ...

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.

The patient reads the chart as far down as possible and should they reach the 20 line, we say that that person has 20/20 vision. Should the eye only see as far down as the 40 line, [20/40], this means ...

First developed in 1862 by Dutch ophthalmologist Herman Snellen, the prototypes of this eye chart began with abstract shapes. Eventually, the chart included those familiar block letters.

The Snellen Eye Chart is still the most recognized design, which can, to some extent, negate its effectiveness, if, for example, the test subject has memorized the chart.5 Most Snellen Charts ...

Vision specialists today use a version of the Snellen Eye Chart with 11 lines of letters. ... With the “tumbling E” chart, the test subject points in which direction the E is facing.

This eye test chart was first invented by Ferdinand Monoyer, a French opthalmologist, ... A Dutch ophthalmologist called Herman Snellen developed a similar chart to Monoyer’s in 1862.

The most important part of testing any organ, is the test of how well the organ works. So, when it comes to the eye, we need to assess how well the eye sees. This function is known as the visual ...