1. Department of Ophthalmology, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
2. Department of Ophthalmology, School of Medicine, College of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan
3. Department of Optometry, College of Medical Science and Technology, Chung Shan Medical University, Taichung 40201, Taiwan