Eighty or more myopic children, all with near-point esophoria as measured at baseline with von Graefe prisms through a current myopic correction placed in a phoropter, will be randomly assigned to wear either single-vision spectacle lenses or lenses with +1.50 D add in a flat-top 28-mm segment. Subjects will visit one of two sites, either a private optometry practice in Tulsa or the optometry clinic at Northeastern State University, every 6 months. Data collected at each visit will include automated refraction after cycloplegia with 1 percent tropicamide, biometry with A-scan, and estimates of the amount of study and other close work by means of questionnaires administered to the subjects and their parents. We will also obtain measures of the degree of myopia in the biological parents. The myopic correction will be changed if the spherical component of the refraction in either eye has changed by 0.5 diopter or more or if any change in cylinder power or axis improves vision in either eye by three letters or more. The study will continue for 30 months and will include six visits by each subject.