1. Department of Ophthalmology, School of Nursing, Pingdingshan Polytechnic College, Pingdingshan 467001, Henan, PR China
2. Department of Rehabilitation, College of Medical Technology and Engineering, Zhengzhou Railway Vocational and Technical College, Zhengzhou 450000, Henan, PR China
3. Pingdingshan Federation of Persons with Disabilities Low Vision Rehabilitation Centre, Pingdingshan 467000, Henan, PR China
4. Department of Ophthalmology, Jingzhou Central Hospital, The Second Clinical Medical College, Yangtze University, Jingzhou 434020, Hubei, PR China