Clinical Associate Professor Quah graduated from the National University of Singapore in 1987 and was trained in Ophthalmology at the Singapore General Hospital, Tan Tock Seng Hospital and Singapore National Eye Centre (SNEC). From 1998 – 1999 he was an International Fellow at The Hospital For Sick Children in Toronto, where he underwent training in Paediatric Ophthalmology and Adult Strabismus. He has won the prestigious John Gaby Best Fellow Research Prize at University of Toronto for producing the best research work amongst Ophthalmology Fellows at the University in 1999. In his formative years, Clinical Associate Professor had also won various awards for his research writings including the 1st prize in Institute of Biology national essay writing competition on "Ethics of Bioengineering" (1981) and SNEC Merit Award for Research (1996).

Clinical Associate Professor Quah is a Fellow of the Academy of Medicine (Singapore), Fellow of Royal College of Surgeons of Edinburgh, and a Council Member of Asia-Pacific Strabismus and Paediatric Ophthalmology Society. His clinical areas of interest include Paediatric Ophthalmology, Squints (Strabismus), Cataracts in adults and children, and General Ophthalmology. He is actively involved in training of doctors at all levels from medical students, medical officers to ophthalmology trainees and fellows.

Clinical Associate Professor Quah has participated as invited speaker at many local and international meetings. He has published book chapters and numerous research papers. His research interests include strabismus, retinoblastoma and paediatric eye disorders. He derives energy from an active and sporting lifestyle and still indulges in the occasional competitive swimming and running.