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为探讨青少年视力不良的发病规律，提高防治水平，总结1992－1998年塘沽区中小学在校学生视力不良资料如下。1材料与方法在塘沽区学校卫生保健所的指导下，各校卫生老师对全区中小学1992－1998年所有在校学生采用对数视力表进行视力检测。凡探眼视力在5.0及以上为正常，5．0以
In order to explore the incidence of poor vision in adolescents and improve the level of prevention and control, summarizes the Tanggu District primary and secondary school students in 1992-1998 poor visual acuity data are as follows. 1 Materials and Methods Under the guidance of the Tanggu District School Health Care Institute, the school health teachers of all primary and secondary schools in the region 1992-1998, all school students with visual acuity chart for visual acuity testing. Where the eye sight in 5.0 and above as normal, 5.0 to