Please provide your email address to receive an email when new articles are posted on . SAN FRANCISCO — Active outreach, education and ensuring that spectacles are available at an affordable cost are ...

The first law of refraction states that the incident rays, refracted rays, and the normal to the interface at the point of incidence, all lie in the same plane. The ratio of the sine of the angle of ...

To compare focometer and autorefractor in the measurement of refractive errors among students in an underserved community of sub-Saharan Africa. A total of 230 students were studied. Mean age of the ...

Langis Michaud has received research funding from Bausch and Lomb, Neurolens and Fitlens. He has received speaker's fees from Johnson and Johnson and Essilor. Université de Montréal provides funding ...