Abstract: Objective To analyze the spatial distribution characteristics of poor vision in children and adolescents in Shandong province, in order to provide scientific basis for the prevention and control of poor vision. Methods Data were from the database of physical examination of 9.39 million children and adolescents aged 6 to 18 years in Shandong province in 2015.The data of left and right eye vision were acquired, and Arc GIS 9.3 software was used to present the spatial distribution of poor vision of 6 to 18-year-old children and adolescents in Shandong province, and their regional distribution characteristics were described. Results The total poor vision rate among children aged 6 to 18 in Shandong province was 38.7% in 2015, and the rates of mildly, moderately and severely poor vision were 7.5%,14.2% and 17.1%, respectively.The rate of poor vision in urban areas was higher than that in rural areas (47.9% vs.33.3%), and it was higher in girls than boys (42.3% vs.35.7%)(P＜0.05).The rate of poor vision in central and northeastern areas of Shandong province was higher, so were the distribution of poor vision in boys and girls.And mildly poor vision showed scattering distribution. Conclusions There are obvious spatial differences on the distribution of poor vision among children and adolescents aged 6 to 18 years in Shandong province.Thus spatial ingredients should be considered when the local departments make relevant strategies

Key words: poor vision, spatial distribution, Arc GIS, Shandong province, children and adolescents

摘要： 目的 分析山东省儿童青少年视力低下的地域分布特征，为开展视力低下防控工作提供科学依据。方法 样本来源于2015年山东省体检数据，共纳入939万名6～18岁儿童青少年。获取左右眼视力等数据，利用Arc GIS 9-3 软件呈现山东省6～18岁儿童青少年视力不良空间分布图，描述其地区分布特征。结果 2015年山东省6～18岁儿童青少年总体视力不良率为38.7%，轻度、中度、重度视力不良率分别为7.5%、14-2%和17-1%。其中城市视力不良率高于乡村（47-9% vs-33-3%），女生视力不良率高于男生（42-3% vs-35-7%），差异均有统计学意义(P<0-05)。2015年山东省儿童青少年总体及中、重度视力不良空间分布表现为山东中部及东北沿海地区检出率较高，男女生视力不良也呈现类似分布。轻度视力不良呈零散分布。结论 山东省6～18岁儿童青少年视力低下空间分布存在显著差异，提示有关部门制订相关政策时考虑地区因素，采取针对性干预措施。

关键词: 视力不良, 地域分布, 地理信息系统, 山东省, 儿童青少年