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A/Prof Chelvin C. A. Sng

Photo of A/Prof Chelvin C. A. Sng
  • Senior Consultant, Department of Ophthalmology, National University Hospital
  • Senior Consultant, Alexandra Hospital
BA, MBBChir, MA(Cambridge), MRCSEd, FRCSEd, MMed, FAMS
Ophthalmology (Eye)
Cataract, General Ophthalmology, Glaucoma, Healthy Ageing Programme (Age Better)
Special Interests:
​Complex Cataract


A/Prof Chelvin C. A. Sng is a Fellow of the Royal College of Surgeons of Edinburgh and specialises in cataract and glaucoma surgery. She graduated from Gonville and Caius College in Cambridge University with triple First Class Honours and Distinctions. As the top medical student in her college, she was awarded numerous college prizes, including the Tucker’s Prize for Medicine and the Charles and Iris Brook Prize. As a house officer, she received the SingHealth Best House Officer Award and the Commendation Award for House Officer from the NUS Dean’s Office. She was also the most outstanding candidate in her year for the Specialist Accreditation Examination, with Gold Medals conferred for being the best candidate for Glaucoma, Cataract and Refractive Surgery, Neuroophthalmology and Paediatric Ophthalmology. She received the Singapore Society of Ophthalmology (SSO) Young Ophthalmologist Award, and was named as one of the “Top 50 Rising Stars” in the global Ophthalmology Power List in 2017 (ranked #9 on the list and most highly-ranked female ophthalmologist, She received the Asia Pacific Academy of Ophthalmology (APAO) Achievement Award in 2019. 

As a recipient of the Academic Medicine and Development Award, A/Prof Sng completed the glaucoma fellowship at Moorfields Eye Hospital in London, the largest eye hospital in Europe. During her fellowship, she was trained in the management of complex and severe glaucoma under the supervision of internationally renowned ophthalmologists, including Dr Keith Barton and Professor Sir Peng Khaw. After her fellowship, she was an Honorary Consultant at Moorfields Eye Hospital from 2015 to 2018.

Being the first Asian surgeon to implant several minimally invasive glaucoma surgery (MIGS) devices (including the iStent Inject, the XEN Gel Implant, the CyPass Micro-Stent and the InnFocus / PreserFlo Microshunt), A/Prof Sng is regarded as a pioneer of MIGS in Asia. She is regularly invited to speak at international conferences. is on several medical advisory boards, and was appointed the Convenor of the Asia-Pacific Glaucoma Society (APGS)-MIGS Interest Group ( She is currently conducting a prospective study investigating the outcomes of MIGS in Asian patients, which also funds the cost of one MIGS device for each study patient. A/Prof Sng is the co-inventor of a novel glaucoma drainage device (Paul® Glaucoma Implant), which has received CE mark clearance by the European Commission (EC) and is currently undergoing international clinical trials. She is also proficient in conventional glaucoma surgery (trabeculectomy, Ahmed glaucoma drainage device insertion and Baerveldt glaucoma drainage device insertion) and trained in complex cataract surgery, including the scleral fixation of intraocular lenses and femtosecond laser cataract surgery.

A/Prof Sng is actively involved in research on glaucoma surgery and imaging, with over 60 publications in peer-reviewed journals (including Ophthalmology, British Journal of Ophthalmology, American Journal of Ophthalmology), and has secured more than $2,000,000 in research funding. She is an examiner for the local medical undergraduate and residency examinations, and also chairs and organizes instruction courses at the European Society of Cataract and Refractive Surgeons (ESCRS) and APAO meetings. She has served in less fortunate communities which have little or no access to healthcare, and volunteers regularly in medical missions to the less accessible areas in South East Asia, India and Africa.


• Asia-Pacific Academy of Ophthalmology Achievement Award (2019)
• Singapore Society of Ophthalmology Young Ophthalmologist Award (2017)
• Voted #9 on Ophthalmologist Power List (2017) (
• American Academy of Ophthalmology Best Poster Award (2015)
• Academic Medicine Development Award (2014)
• Australian and New Zealand Glaucoma Interest Group Scholarship Award (2014)
• American Society of Cataract and Refractive Surgeons Best Paper of Session Award (2014)
• American Society of Cataract and Refractive Surgeons Film Festival 1st Runner-Up Award (2012)
• Ophthalmology Specialist Accreditation Examination (2012)
o Gold Medals for “Glaucoma”, “Cataract and Refractive Surgery”, “Neuroophthalmology”, “Paediatric Ophthalmology”
• National Medical Research Council New Investigators Grant (2011-2015)
• American Academic of Ophthalmology Best Poster Award (2011)
• Association for Resarch in Vision and Ophthalmology International Travel Grant Award (2008)
• SingHealth Best House Officer Award (2006)
• Commendation Award for House Officer (NUS Dean’s Office) (2006)
• Undergraduate Awards from Cambridge University
o Charles and Iris Book Prize (2004), William Harvey Studentship (2004), Clinical Scholarship (2004), Ian Gordan-Smith Prize for Medicine (2002), The Walter Myers Exhibition for Medicine (2002), The Michell Scholarship for Medicine (2002), The Anne Pearson Prize for Medicine (2002), Max A. Barrett Prize (2002), Tucker’s Prize for Medicine (2001), Senior Scholar (2000)

Journals & Publications

Selected Publications (From >60 Publications)
• Hernstadt D, Cheng J, Htoon HM, Sangtam T, Thomas T, Sng CCA*. Case series of combined iStent implantation and phacoemulsification in eyes with primary angle closure disease: one-year outcomes. Adv Ther 2019;36:976-86.
• Reitsamer H, Sng C*, Vera V, Lenzhofer M, Barton K, Stalmans I, Apex Study Group. Two-year results of a multicentre study of the ab interno gelatin implant in medically uncontrolled primary open-angle glaucoma. Graefes Arch Clin Exp Ophthalmol 2019;257:983-96
• Sng C, Barton B. minimally invasive glaucoma surgery: coming of age. Br J Ophthalmology 2018;102:1315-6.
• Sng CC*, Wang J, Hau S, Htoon HM, Barton B. XEN-45 collagen implant for the treatment of uveitic glaucoma. Clin Exp Ophthalmol 2018;46:339-45.
• Sng CCA*, Harasymowycz P, Barton K. Micro-invasive glaucoma surgery. J Ophthalmol 2017;2017;9845018.

* Corresponding author

• Wong TY, Sng C, Lim L. The Ophthalmology Examinations Review. 2nd ed. World Scientific Publishing Co;2011.

Book Chapters
• Sng C, Aduan J, Aquino MCS, Chew P (2014). Lasers in angle closure glaucoma. In Shaarawy T, Dada T, Bhartiya S (Eds.), ISGS Textbook of Glaucoma Surgery, New Delhi, India: Jaypee Brothers.
• Sng C, Chew P (2014). An overview of angle-closure management – Spotlight. In Shaarawy T, Sherwood M, Hitchings R, Crowston J (Eds.), Glaucoma, Second Edition, Chennair, India: Elsevier.
• Sng C, Perera S (2018). Intraoperative gonioscopy and gonioscopic-guided surgery. In Dada T, Sidhu T (Eds.), Gonioscopy: A Text and Atlas, Second Edition, New Delhi, India: Jaypee Brothers.

• “Ocular Drainage Device and Method of Manufacturing Thereof” (US 9,808,374, B2; ZL 201580010268.6; 11201603540P)

Professional Memberships

​Professional Appointments and Committee Memberships
• Convenor, APGS-MIGS Interest Group ( (2018-present)
• Member, World Glaucoma Congress 2021 Program Planning Committee (2019-present)
• Member, College of Ophthalmology Glaucoma Subspecialty Committee (2016-present)
• Member, Ophthalmology Examinations Standard Setting Committee (2016-present)