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 ...

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 ...

Please provide your email address to receive an email when new articles are posted on . The Hadassah Self-Visual Acuity Screener demonstrated high reliability, accuracy and alignment with standard ...

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 ...

To compare the macular functions of patients with excellent visual acuity after retinal detachment (RD) surgery, with the healthy fellow eye. Of 214 patients, nine patients, who were successfully ...

SAN FRANCISCO, California — A vision-testing system that factors real-world contrast and lighting conditions into the measurement of acuity could help ophthalmologists understand why patients 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 ...

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 ...

Visual acuity is a measure of how small a detail that is visible can be, and still be identified by a person. The most common way of testing vision is to use an eye chart, (the kind that you see in an ...