Smartphone-based Snellen visual acuity charts has become popularized; however, their accuracy has not been established. This study aimed to evaluate the equivalence of a smartphone-based visual acuity ...

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 ...

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. You may not recognize his name, ...

In an effort to better educate patients and empower them to take the next step toward visual freedom, Brinton Vision has released a new, comprehensive Vision Correction Comparison Chart. The chart ...

Reading your prescription starts by identifying which values belong to which eye. “OD” refers to your right eye and “OS” to ...

Her eye chart tests showed improvement. It took a radical experiment to find out why her reality wasn’t matching up. By Lisa Sanders, M.D. The burning started as soon as the 59-year-old woman put the ...

Imagine seeing better by thinking differently. That’s a vision with a future, according to Harvard University psychologist Ellen Langer. Eyesight markedly improved when people were experimentally ...