January 18, 1908, is the anniversary of the death of Dutch ophthalmologist Herman Snellen, who created the familiar test for visual acuity And now a page from our "Sunday Morning" Almanac, January ...

We’d like to see Snellen’s tumbling E chart implemented as well for children who don’t yet know the alphabet, although that would probably require a vastly different input method.

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.

One of Snellen’s big accomplishments was standardizing the eye chart so that others could use the same principles to develop their own tests. So we decided to give it a try.

Hello,I'm an eye doctor looking to start my own practice. I have been throwing around the idea to make my own program to display the letters that everyone reads, ie, the snellen acuity chart. The ...

To evaluate the relationship between visual acuity as measured by the Early Treatment Diabetic Retinopathy Study (ETDRS) chart and by the potential acuity meter (PAM) with retinal thickness and ...

The traditional shrinking letters of the Snellen chart have been replaced with silhouettes of shrinking modern chair designs such as the Eames’s Molded Plywood chair, Arne Jacobsen’s Egg Chair ...

The ETDRS charts were read from a distance of 4 m. Printed Crowded logMAR Kay Picture Tests 1 and 2 (KAY PICTURES, Tring, UK) were used and were viewed from their design distance of 3 m.

For over one hundred years, various charts have been in use for this purpose, and the most commonly used one is the Snellen chart. It was designed by Herman Smelled, a Dutch ophthalmologist.