ANSWER: Chalk that up to Dr. Hermann Snellen (1834-1908), a Dutch professor of ophthalmology. Snellen developed his eye chart in 1862 to measure visual acuity and it rapidly became the global standard ...

What does 20/20 vision mean? When you visit your doctor or an eye care professional, you may be asked to read an eye chart. You may be told you have normal 20/20 vision. What does that really mean? An ...

Please provide your email address to receive an email when new articles are posted on . Visual acuity is still measured using tools developed more than 150 years ago: the Snellen eye chart, developed ...

We were unable to process your request. Please try again later. If you continue to have this issue please contact customerservice@slackinc.com. The key elements of the traditional eye exam — the ...

It's been around for more than a century, yet it's always been incomplete--until now. Wanted: An Eyesight Chart That’s Also A Mid-Century Design Quiz ...