ABSTRACT
Myopia, or nearsightedness, has been known since ancient times. It is thought that Emperor Nero of Rome used a modified concave lens to correct his myopia. Not until the early 17th century did the work of the Czech physicist Kepler establish the geometric basis for ametropia. Kepler was the first to point out that good vision depended on a clear retinal image, which was determined by incoming light being focused on the retina.
