AIM:To observe the effect of wearing glasses with full correction or undercorrection on the development of early true low myopia. METHODS:This retrospective study included 50 cases (100 eyes) aged 8-12 years old in school from July 2010 to August 2011. Diopter was between -1.00D and -2.00D. They were divided into 2 groups, both with cycloplegic mydriasis medical optometry. In group 1, myopic degree was -1.55±0.37D with full correction (50 eyes); in group 2,myopic was -1.50±0.48D with undercorrection (50 eyes), the development of myopia was compared with students t-test in two groups. RESULTS: Degree of myopia was increased -0.75±043D in the first group, that in the second group was -1.55±0.27D, the difference was significant (P＜0.01). CONCLUSION: The development of myopia is rapid if myopia wear glasses with undercorrection. People with more than -1.00D of myopia should wear glasses with undercorrection which can improve retinal image quality, so that the development of myopia may be decreased than that with undercorrection.