Myopia defined Myopia, also known as nearsightedness, is a common type of refractive error where close objects appear clearly, but distant objects appear blurry. Cases of refractive error include myopia of 1.0 diopters or more. Read more about myopia See tables for nearsightedness (myopia) data 2010 U.S. age-specific prevalence rates for myopia by age and race/ethnicity 2010 prevalence rates of myopia by race 2010 U.S. prevalent cases of myopia by race/ethnicity 2010 U.S. prevalent cases of myopia by gender Projections for myopia (2010-2030-2050) Changes of cases between 2000 and 2010 2000 U.S. prevalent cases of myopia by race/ethnicity 2000 U.S. prevalent cases of myopia by gender