This week’s question was asked by: a close relative. QUESTION:Why is there that big E on the top of eye charts? ANSWER: We can credit Dr. Hermann Snellen, a Dutch ophthalmologist at the Netherlands ...
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 ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback