Dr. John Chang was trained in ophthalmology at Jules Stein Eye Institute UCLA. He then did a fellowship at UCSF. He is presently the President-elect of the International Society of Refractive Surgery (ISRS). He is Past President of the Hong Kong Association of Private Eye Surgeons and is Associate Clinical Professor of The University of Hong Kong and the Chinese University of Hong Kong. Dr. Chang is currently the Director of the Guy Hugh Chan Refractive Surgery Centre of Hong Kong Sanatorium & Hospital. He is Clinical Instructor for many refractive intraocular lenses and procedures and frequently runs courses for doctors in the region. He is on the Executive Committee of the APACRS, is on the Editorial Board of Cataract & Refractive Surgery Today and Ocular Surgery News, and is chief editor of the Chinese edition of EuroTimes.

Summary of Presentations

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Thursday, 03 October 2019
Kobu Room, 3F
11:00 – 11:15hrs
MC5: Mastering Multifocals & Presbyopia (10:30–12:00hrs)
- Course Director: John CHANG
Trifocals, Bifocals, EDOF: A Comparison
Saturday, 05 October 2019
Gyoun Room, 4F
14:10 – 14:18hrs S10-2
S10: SUMO – Wrestling with Challenges in Refractive Surgery (14:00–15:30hrs)
Should Refractive Surgery Laser Treatment Be Centered on Pupil Center, Corneal Vertex or Somewhere in Between?
屈折矯正レーザー治療は瞳孔中心、角膜頂点あるいはその中間を中心にするか?