The increase in the rate of myopia and the progression of myopia is currently a matter of concern in Vietnam. The study was conducted to review the clinical characteristics of myopia in school children, and (2) to evaluate factors associated with myopia progression. The results showed that the myopia detection has higher rate in primary school children (55.2 percent). The average degree myopia is -2.8 + or - 1.53. Myopia progression was more rapid in patients with myopia over 4 years (42.9 percent), high amount of myopia (43.8 percent), full-time wearing of eyeglass (71.4 percent), good learning results (58.2 percent), prolonged near work (64.3 percent). In conclusions, the progression of myopia was significantly related to long-term myopia, high amount of myopia, regular follow-up, full-time wearing of eyeglass, good learning results, and prolonged near work.