In April, 2016, The Fred Hollows Foundation, in alliance with The Second People’s Hospital of Yunnan Province and another six hospitals in Dali Prefecture and Wenshan Prefecture, “Seeing is Believing” Phase V: A Comprehensive Rural Eye Care Model in Yunnan Provincial was launched . In the project activities KAP survey is designed, with its focuses on: children refractive error , cataract and diabetic retinopathy, so as to understand the knowledge of, the practice for and the attitude toward these three diseases, thus take interventions more effectively and achieve the goal of the Project. On the basis of this, surveys were conducted in four project sites. This report is on the survey against cataract of middle-age & old-age people, and the survey sites are located at the four project counties: Nanjian, Binchuan, Yanshan and Qiubei.