About Crystal

Crystal Wong (王水晶) is a Hong Kong registered optometrist (Part I) and a PhD candidate in Optometry at The Hong Kong Polytechnic University, with seven years of clinical and research experience, focusing on paediatric myopia control, strabismus and amblyopia, binocular vision assessment and vision training.

Professional qualifications and registration

Registered optometrist (Part I), Optometrists Board of Hong Kong
BSc (Hons) in Optometry, The Hong Kong Polytechnic University , including an international clinical placement at the University of Waterloo, Canada
PhD candidate in Optometry, The Hong Kong Polytechnic University.

Clinical expertise

Paediatric myopia control: orthokeratology (ortho-k), assessment for defocus-incorporating spectacle lenses, co-management with low-concentration atropine, and specialty soft contact lens fitting
Binocular vision: assessment of paediatric binocular vision and accommodative function, strabismus and amblyopia assessment, and vision training
Specialty contact lenses: scleral lens fitting for irregular corneas and custom rigid gas-permeable lens fitting
Co-management: co-managed more than 200 refractive and cataract surgery cases with ophthalmologists

Research focus

Crystal's PhD research examines the neuromodulation of visual cognitive function — combining transcranial magnetic stimulation (TMS), electroencephalography (EEG) and eye-tracking to study the visual cognitive mechanisms of children with dyslexia. In 2026 she was invited to undertake a three-month research visit at the University of Melbourne. Beyond her research, Crystal has also developed the online vision training platform Orca, exploring the possibilities of home-based vision training.

Selected publications

Wong, S.-C., Kee, C.-S., & Leung, T.-W. (2022). High Prevalence of Astigmatism in Children after School Suspension during the COVID-19 Pandemic Is Associated with Axial Elongation. Children, 9(6), 919.
Wong, S.-C., Leung, T.-W., Thompson, B., & Cheong, A. M. Y. (2024). Continuous Theta Burst Stimulation on V5/MT+ Induces Hemifield-Specific Modulation of Motion Sensitivity. IOVS, 65(7), 2453 (ARVO 2024 oral presentation).

Awards

PolyVision Award for Best Year 4 Student (2018)
Skyview Optical Travelling Scholarship (2018)
The Hong Kong Polytechnic University Entrance Scholarship (2014–2019)

All qualifications and registration details on this page can be verified with the relevant institutions. The content of this website is provided for health education purposes only; individual advice is given only after a clinical examination.