Results from smartphone-based Snellen charts, which are eye charts used to measure visual acuity, are not consistent with results from standard Snellen visual acuity chart tests, according to a study ...

A new study shows potential for eye tests to be conducted easily and affordably using a smartphone app. An app to test eyesight easily and affordably using a smartphone is as accurate as traditional ...

A smartphone-based test for visual acuity is as accurate and repeatable as currently available standard visual acuity tests, according to a new study published online May 28 in JAMA Ophthalmology. The ...

Our formula for calculation of optotype size is also based on the arcminutes subtended by each letter, where we have calculated the ideal optotype size for a standard letter and combined this with ...

What if you could give yourself a standard eye exam at home? That’s the idea behind [Joel, Margot, and Yuchen]’s final project for [Bruce Land]’s ECE 4760—simulating the standard Snellen eye chart ...

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 ...

Visual acuity--the ability to discern letters, numbers, and objects from a distance--is essential for many tasks, from recognizing a friend across a room to driving a car. Researchers previously ...

What is the farthest a human can see? What is the best recorded visual acuity? How far is the horizon? I am often asked these questions by clinicians and non-ophthalmologists and thought many of you ...

Finely tuned eye movements are instrumental in enhancing visual acuity, according to findings of a study published in Nature Communications. Finely tuned eye movements are instrumental in enhancing ...

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 ...

Visual acuity -- the ability to discern letters, numbers, and objects from a distance -- is essential for tasks including recognizing a friend across a room and driving. Researchers previously assumed ...