Chen Youxin 1986 graduated from university, 1989 got the master's degree in ophthalmology, 1993 studied the clinical and scientific research of ocular fundus diseases with Professor Zhang Chengfen, and 1996 got the doctor's degree in ophthalmology. 1999-200 1 Postdoctoral research on retina at the Institute of Ophthalmology, University of Southern California, USA. 1995 pioneered the clinical and research work of choroidal blood vessels in China. He has accumulated rich experience in choroidal angiography and diagnosis and treatment of difficult fundus diseases. In recent years, photodynamic therapy has provided a new treatment for choroidal neovascularization and achieved good results. At the same time of clinical work, actively carry out scientific research work.