Profile of 322 patients with visual impairment presenting in Yinchuan City, Ningxia Hui Autonomous Region
LI Jia1, WANG Jun1, ZHAO Zhi-qing2, MA Zhan-xiu2
Ophthalmology in China . 2017, (2): 135 -138 .  DOI: 10.13281/j.cnki.issn.1004-4469.2017.02.015