Objective: To study the effect of atropine dilation on the diopter of patients with different myopic progression time and age,and to explore the time of atropine mydriatic optometry. Methods: 289 patients were divided into group A and group B by myopia progression in 3 months and over 3 months,to study the diopter differences among the small pupil,mydriatic eyes with compound tropicamide and atropine. Results: In group A,patients of all ages and group B of patients aged 6-12 years were compared after the pu...