What is the perfect vision score?
Many people think that 20/20 means "perfect vision." But "20/20" really just means "normal distance vision." The number ratio we are all familiar with such as "20/20" or "20/40" or even "20/400" are measures of distance visual acuity, or sharpness. They do not give any idea of what...
in Uncategorized
05 Nov 2023