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Adj A/Prof Loon Seng Chee

Photo of Adj A/Prof Loon Seng Chee


  • Senior Consultant, Department of Ophthalmology, National University Hospital
  • Head & Senior Consultant, Department of Ophthalmology, Alexandra Hospital


MBBS, FRCSEd, MMed (Ophth), MMed with Merit (Clinical Epidemiology)



Clinical Disciplines/Programmes:

Cataract, General Ophthalmology, Glaucoma, Uveitis


Adjunct A/Prof Loon is the Head of Ophthalmology at Alexandra Hospital and a Senior Consultant in National University Hospital. He is also the cluster glaucoma subspeciality head. He specialises in performing laser and surgery for glaucoma, as well as complex cataract surgery. He also specialises in the epidemiology of eye diseases, using the research of eye disease in applying the latest technologies whilst ensuring safety and efficacy in treatment.

He received his basic training in Singapore, with specialist degrees conferred from the National University of Singapore and Edinburgh. He underwent further fellowship and training in Sydney University, where he obtained a second Masters of Medicine (Merit) in Clinical Epidemiology.

He is also keen in medical outreach, and has done medical mission work in Bangladesh, China, Indonesia and Nepal with like-minded friends and colleagues. In 2011, he was conferred the Humanity Award by President Nathan for his work in medical mission work, which he has been doing for more than 18 years. He was conferred the inaugeral Master Clinician Award in 2023.


  • 2023 - Master Clinician Award

Journals & Publications

  1. Tan MCJ, Choy HYC, Koh Teck Chang V, Aquino MC, Sng CCA, Lim DKA, Loon SC, Chew Tec Kuan P.J Two-Year Outcomes of the Paul Glaucoma Implant for Treatment of Glaucoma. Glaucoma. 2022 Jun 1;31(6):449-455. doi: 10.1097/IJG.0000000000001998. Epub 2022 Feb 18.PMID: 35180153
  2. Asano S, Koh TCV, Aquino MC, Lim KD, Sng CCA, Loon SC, Chew TKP Comparison of refractive outcomes after combined cataract and glaucoma surgery: trabeculectomy and glaucoma drainage device implantation.. J Cataract Refract Surg. 2021 Sep 1;47(9):1133-1138. doi: 10.1097/j.jcrs.0000000000000610. PMID: 34468450
  3. Lim EJY, Aquino CM, Lun KWX, Lim DKA, Sng C, Loon SC, Chew PTK, Efficacy and Safety of Repeated Micropulse Transscleral Diode Cyclophotocoagulation in Advanced Glaucoma. Koh VTC. J Glaucoma. 2021 Jul 1;30(7):566-574. doi: 10.1097/IJG.0000000000001862. PMID: 33927146
  4. Lim, E. J. Y., Cecilia, A. M., Lim, D. K. A., Sng, C. C. A., Loon, S. C., Lun, K. W. X., . . . Koh, V. T. C. (2021). Clinical Efficacy and Safety Outcomes of Micropulse Transscleral Diode Cyclophotocoagulation in Patients With Advanced Glaucoma. JOURNAL OF GLAUCOMA, 30(3), 257-265. doi:10.1097/IJG.0000000000001729
  5. Ong, S. C., Razali, M. A. B., Shaffiee, L., Yap, J. X., Fei, T. T. Y., Loon, S. C., & Koh, V. (2020). Do Slit-Lamp Shields and Face Masks Protect Ophthalmologists amidst COVID-19?. Ophthalmology, 127(10), 1427-1429. doi:10.1016/j.ophtha.2020.06.031
  6. Ong, S. C., Yap, J. X., Tay, T. Y. F., Mo, Y., Loon, S. C., & Koh, V. (2020). Considerations in the use of slit lamp shields to reduce the risk of respiratory virus transmission in coronavirus disease 2019. Current opinion in ophthalmology, 31(5), 374-379. doi:10.1097/ICU.0000000000000690
  7. Khor, W. B., Yip, L., Zhao, P., Foo, V. H. X., Lim, L., Ting, D. S. W., . . . Wong, H. T. (2020). Evolving Practice Patterns in Singapore's Public Sector Ophthalmology Centers During the COVID-19 Pandemic. ASIA-PACIFIC JOURNAL OF OPHTHALMOLOGY, 9(4), 285-290. doi:10.1097/APO.0000000000000306
  8. Tong W, Romero M, Lim V, Loon SC, Suwandono ME, Shuang Y, Di X, Kanagasingam Y, Koh V. Reliability of Graders and Comparison with an Automated Algorithm for Vertical Cup-Disc Ratio Grading in Fundus Photographs. Ann Acad Med Singapore. 2019 Sep;48(9):282-289.
  9. Sachdev N, Aquino MC, Loon SC, Chan YH, Chew P, Koh V. Outcomes and Complications of Scleral-Fixated Intraocular Lens Combined with Ahmed Tube Surgery. J Ophthalmol. 2018 Mar 25;2018:9824035. doi: 10.1155/2018/9824035. eCollection 2018.
  10. Koh V, Chen D, Aquino CM, Aduan J, Sng C, Loon SC, Chew P. Success rates of 2-site phacoemulsification combined with fornix-based trabeculectomy using mitomycin C for primary angle-closure glaucoma and primary open-angle glaucoma in an Asian population. Jpn J Ophthalmol. 2017 May;61(3):245-252. doi: 10.1007/s10384-017-0502-4. Epub 2017 Feb 10. PMID: 28188405

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