Cataract was the principle cause of visual impairment and blindness in Shanghai residents with type 2 diabetes. (9th December 2015) - Xu, Xian; He, Jiangnan; Xu, Xun; Du, Xuan; Bai, Xuelin; Zhang, Bo; He, Xiangui; Lu, Lina; Zhu, Jianfeng; Zou, Haidong