C-Y Cheng1, P-Y Chen2, C-J Lin3. 1. Department of Ophthalmology, Changhua Christian Hospital, Changhua, Taiwan. 2. Department of Pathology, Changhua Christian Hospital, Changhua, Taiwan. 3. 1] Department of Ophthalmology, Changhua Christian Hospital, Changhua, Taiwan [2] Department of Ophthalmology, China Medical University Hospital, Taichung, Taiwan [3] School of Medicine, China Medical University, Taichung, Taiwan.