[Problems to be resolved urgently on amblyopia diagnosis and prevention in China].

For many years, the best corrected vision less than 0.9 was an unique amblyopia diagnostic criteria in the clinical practices in China. Because of no different visual acuity criteria for younger-aged children, the amblyopia prevalence was increased. In clinical practice, two phenomenons exist in the amblyopia diagnosis and prevention. One is that ignores the risk factors for amblyopia development and only considers the factor of visual acuity. The other is that only uses a corrected visual acuity of 0.9 as diagnostic criteria and ignores the visual development with ages. Therefore, it should be taken the different visual acuity criteria for amblyopia diagnosis in younger-aged children. And it should be emphasized on the co-existed risk factors in the amblyopia diagnosis.