Bi-lv LIANG ; Ci-kuang GUO ; Jian-sheng CAI ; Jian YE ; Rui-qing JIANG ; Ling-yu GUAN ; Wei MAI ; Shao-liang LIN ; Xian-dong CAO
Chinese Journal of Epidemiology 2010;31(3):358-359
Eye Diseases ; prevention & control ; Home Care Services ; Humans ; Schools ; Single-Blind Method ; Students ; Urban Population