1. 12 Examination included far and near visual acuity test, eye refractive status (based on retinoscopy , with 1%atropine cycloplegia), eye fundus, corneal curvature, eye axial length.

2. Methods: For the 423eyes of the juvenile (10-14 years) with the naked eye vision of 0 We make routine vision examination and apply cydopleyicsbefore retinoscopy .