Myopia, or nearsightedness, causes blurry vision that usually is corrected with glasses, contact lenses, or refractive surgery. The lifetime prevalence of myopia has been reported to be 80% to 90% in population-based studies in Asia.1 Myopia is also very common in other parts of the world, with a prevalence of almost 50% in many parts of Europe2 and an estimated increase in prevalence from 25.0% in 1971-1972 to 41.6% in 1999-2004 in the US.3