Yih-Chung Tham1,2, Ching Yu Cheng1,2, Tien Yin Wong3,4. 1. Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore. 2. Ophthalmology & Visual Sciences Academic Clinical Program (Eye ACP), Duke-NUS Medical School, Singapore, Singapore. 3. Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore. wong.tien.yin@singhealth.com.sg. 4. Ophthalmology & Visual Sciences Academic Clinical Program (Eye ACP), Duke-NUS Medical School, Singapore, Singapore. wong.tien.yin@singhealth.com.sg.