Paediatric Vision · Myopia Control · Vision Training
Crystal Wong 王水晶
Registered Optometrist, Hong Kong
Crystal Wong (Chinese name: 王水晶; full name: Crystal Wong Suei Cheng) is a Hong Kong registered optometrist (Part I) and PhD researcher in vision neuroscience, with seven years of clinical and research experience in children's vision — myopia control, strabismus and amblyopia assessment, binocular vision and vision training.
Book via WhatsApp About Crystal
PhD researcher (vision neuroscience)
Clinical services
Every child's visual development is different. A detailed assessment comes before any recommendation.
Myopia control for children
Orthokeratology (Ortho-K), defocus spectacle lenses (DIMS), low-dose atropine co-management and specialty soft contact lens fitting — tailored to your child's age, progression rate and lifestyle.
About myopia control →Strabismus, amblyopia & vision training
Strabismus and amblyopia assessment, post-surgical binocular vision rehabilitation, and vision training for functional problems such as convergence insufficiency.
About vision training →Binocular vision assessment
A comprehensive check of eye alignment, accommodation, fusion and stereopsis — for children with double vision, head tilt, or who skip lines and lose their place when reading.
What the assessment covers →
Clinician and vision scientist
BSc (Hons) in Optometry from The Hong Kong Polytechnic University, now a PhD researcher in vision neuroscience (expected December 2026) studying visual-cognitive function. Clinical internship at the University of Waterloo, Canada; oral presentation at ARVO 2024. Consultations available in Cantonese, Mandarin and English, serving families from Hong Kong and mainland China.
Full profile →Common questions from parents
At what age should a child have their first comprehensive eye examination?
Around age three is generally recommended — earlier if there is a family history of high myopia, strabismus or amblyopia, or if the child squints, tilts their head or rubs their eyes frequently. The preschool years are a critical window for visual development.
How is a binocular vision assessment different from a normal eye test?
A standard eye test measures how clearly each eye sees. A binocular vision assessment checks how the two eyes work together — eye alignment, focusing, fusion and depth perception. Some children have normal sight in each eye but struggle to read because the two eyes do not coordinate well. Learn more →
Ortho-K or defocus (DIMS) glasses — which should we choose?
Both are evidence-based myopia control options. The right choice depends on your child's age, prescription, corneal health, hygiene habits and lifestyle, and should follow a comprehensive examination. Learn more →
Does my child still need vision training after strabismus surgery?
Surgery aligns the eyes; it does not automatically rebuild binocular function. Whether training is needed should be decided from post-operative alignment, suppression, stereopsis and fusion testing by the ophthalmologist and optometrist. Learn more →