Parental myopia, near work, school achievement, and children's refractive error.

To quantify the degree of association between juvenile myopia and parental myopia, near work, and school achievement.Refractive error, parental refractive status, current level of near activities (assumed working distance-weighted hours per week spent studying, reading for pleasure, watching television, playing video games or working on the computer), hours per week spent playing sports, and level of school achievement (scores on the Iowa Tests...