Dr. Yeo Tun Kuan is a Senior Consultant at Tan Tock Seng Hospital, Singapore and Senior Clinical Lecturer for Yong Loo Lin School of Medicine, National University Singapore. He completed his Anterior Segment fellowship with Professor Graham Barrett in 2015. His interests are in biometry, formula, and complex cataract & anterior segment surgery. He is an invited member of the IOL Power Club and developed the EVO formula.