Background: Myopia is a refractory disruption which is caused by focus point situated in front of the retina, therefore, the object is not perceived well, especially far objects. This may cause reduction of life quality since 80% of information is acquired from vision. Myopia develops rapidly in childhood especially school years. Knowledge and fast developing technology cause high incidence of myopia in children and teenagers. Aim: This study was conducted to identify the difference of myopia progressivity between children and teenagers. Methods: This study used observational analytic approach with Cohort design. Subjects are all student with myopia in SDN Tlogo, SDN Ngebel and SMA Muhammadiyah 1 Bantul dated September 2016 until February 2017. Sampling method used was cluster sampling. Data acquired then analyzed with Mann- Whitney Test. Result: Seventy one subjects with myopia consist of 39 children and 32 teenagers. Analysis result shows that there is a difference in myopia progressivity between children and teenagers (p=0.001). Mean myopia progressivity per 6 months in children is 0.2308 D, and 0.4219 D in teenagers. Statistically, the addition from both groups do not show progressive result. Eight from 39 children (20.51%) have progressive myopia and 17 from 32 teenagers (53.12%) have progressive myopia. Conclusion: Clinically, teenagers had more myopia progressivity than that of children, because more than 50% of teenagers have progressive myopia.