You have high visual acuity if you can find three mistakes in the picture in 9 seconds! IQ tests are excellent puzzle games to test an individual's intelligence.

A customized scleral lens offers excellent visual acuity and comfort in patients with irregular astigmatism and complex corneal conditions.

21.06.2016: Original article - Our study indicates that the prevalence of visual impairment among children and adolescents, the distribution between partially sighted and blind, and the distribution ...