Kuan-Jen Chen, MD received his medical degree from Kaohsiung Medical University, Taiwan. He completed his residency in Ophthalmology and fellowship in retina at Chang Gung Memorial Hospital, Taoyuan, Taiwan. He also completed an international fellowship at Manhattan Eye, Ear and Throat Hospital and Vitreous Retina Macula Consultants of New York in New York city, USA. He is an active member of the American Academy of Ophthalmology; Asia-Pacific Vitreo-retina Society; Taiwan Macula Society; Taiwan Retina Society; and Ophthalmological Society of the Republic of China (Taiwan). At the present time, he serves as the Associate Professor at Chang Gung University and Director of Retina, Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou branch, Taiwan. His research interests include endophthalmitis, ocular trauma, surgery for complicated vitreoretinal diseases, and medical vitreoretinal and macular diseases. Dr. Chen is the first surgeon in Taiwan to master successful endophthalmitis and ocular trauma treatment and is now expanding his medical expertise at international scale. Up to date, he has published over 100 articles in the field of ophthalmology and retina in English.