Ortho-K: Clear Vision Without Daytime Glasses or Contacts
Custom-fit lenses worn overnight reshape your cornea while you sleep
Ortho-k (orthokeratology) is a non-surgical, fully reversible way to see clearly without glasses or daytime contacts. For children, ortho-k is also one of the most effective treatments to slow myopia progression. Our fellowship-trained optometrists fit patients from across the GTA.
What is Ortho-K?
Ortho-k (orthokeratology) is a non-surgical vision correction method using specially designed rigid gas-permeable contact lenses. You wear them while sleeping, and they gently reshape your cornea overnight. In the morning, you remove the lenses and enjoy clear vision throughout the day — no glasses or contacts needed.
Beyond vision correction, ortho-k is clinically proven to slow myopia progression in children. Studies including the LORIC trial and ROMIO study demonstrate significant efficacy. By starting early, a child's risk of developing high myopia and associated eye health complications later in life can be meaningfully reduced.
Benefits of Ortho-K
Clear vision all day without glasses or daytime contacts.
Clinically proven to slow nearsightedness progression in children.
Non-surgical and reversible — stop wearing and your eyes return to normal.
Safe, proven technology backed by decades of clinical research.
Who Benefits from Ortho-K?
The earlier you start, the more myopia progression you can prevent.
Freedom from glasses for sports, swimming, and daily activities.
Clear vision without daytime lenses — ideal for dusty or active environments.
For those who find daytime contacts uncomfortable or inconvenient.
Fit by an Optometrist Who Wears Ortho-K Herself
Dr. Melissa Yeung first wore ortho-k lenses as a child, and she wears them again today as an adult. She knows the treatment from the patient's side of the lens in a way very few optometrists do — including what it is like to start, to step away for a period of life, and to return.
That firsthand experience shapes how she assesses candidacy, fits lenses, and guides patients through the first few weeks of adjustment. It is also why she now fits her whole family in ortho-k.
When you work with Dr. Yeung, you are working with someone who has worn ortho-k herself — as a kid, and again today.
The Ortho-K Fitting Process
We assess your prescription, corneal shape, and eye health using advanced corneal topography to determine if ortho-k is right for you.
Your lenses are custom-designed based on your corneal map. We teach you proper insertion, removal, and care techniques.
Regular check-ups ensure optimal fit and vision. For children, we track myopia progression with axial length measurements.
Ortho-K Cost & Insurance Coverage
Ortho-k programs typically include the initial fitting, custom lenses, lens care supplies, and follow-up visits over the first year. Final pricing depends on prescription complexity and whether you are fitting one eye or both.
Ortho-k is not covered by OHIP, but many extended health insurance plans cover contact lenses, which can include ortho-k. We direct bill most major Canadian insurance providers for your convenience.
For a detailed breakdown of ortho-k and myopia control costs for Ontario families, see our guide comparing myopia control options.
Your Ortho-K Optometrists
Fluent in English and Cantonese
Dr. Melissa Yeung is a neuro-optometrist with advanced training in vision therapy, neuro-optometric rehabilitation, and complex visual disorders. Following her Doctor of Optometry degree from UC Berkeley, she completed a competitive Residency in Vision Therapy and Rehabilitation at SUNY College of Optometry in New York City, where her clinical excellence earned her the Dr. Martin Birnbaum Memorial Award for expertise in behavioural optometry. She is a Fellow of the Optometric Vision Development & Rehabilitation Association (FOVDR).
Fluent in English and Cantonese
Dr. Jason Huang grew up in Toronto and majored in Biology at Ryerson University before earning his Doctor of Optometry degree from the New England College of Optometry (NECO) in Boston. At NECO, known for its strong clinical training, he gained diverse experience through rotations in primary care, specialty contact lenses, low vision, binocular vision, and ocular disease clinics.
What Our Patients Say
Ortho-K for the Greater Toronto Area
Our single clinic in Markham sees ortho-k patients from across the GTA. Choose the area closest to you for details on reaching us.
Ortho-K FAQs
What is ortho-k?
Ortho-k (orthokeratology) uses specially designed rigid gas-permeable contact lenses worn overnight to gently reshape the cornea while you sleep. You remove the lenses in the morning and enjoy clear vision throughout the day without glasses or daytime contacts.
How much does ortho-k cost?
Ortho-k programs typically include the initial fitting, custom lenses, lens care supplies, and follow-up visits over the first year. Final pricing depends on prescription complexity. Ortho-k is not covered by OHIP, but many extended health plans cover a portion of ortho-k lenses. Contact us for a personalized quote after your consultation.
Is ortho-k safe for children?
Yes. Ortho-k is Health Canada approved and has been used safely for decades. It is particularly beneficial for children as it can slow myopia progression significantly, reducing the risk of serious eye conditions later in life. Children as young as 6-8 years old can be fitted for ortho-k.
How does ortho-k slow myopia progression?
Ortho-k lenses reshape the cornea to create a specific optical profile that signals the eye to slow its elongation. Clinical studies including the LORIC and ROMIO trials have demonstrated significant reduction in myopia progression compared to glasses or regular contacts.
How long does it take to see results with ortho-k?
Most patients notice improved vision after the first night, with optimal results within 1-2 weeks of consistent wear. The full myopia control effect develops over several months of regular overnight wear.
Can adults use ortho-k?
Yes. While ortho-k is particularly beneficial for children to slow myopia progression, adults also use it for glasses-free vision during the day — ideal for sports, swimming, dusty work environments, or anyone who dislikes wearing glasses or daytime contacts.
What happens if I stop wearing ortho-k lenses?
Ortho-k effects are temporary and reversible. If you stop wearing the lenses, your cornea gradually returns to its original shape over a few days, and your vision returns to its previous prescription.
Is ortho-k covered by OHIP or insurance?
Ortho-k is not covered by OHIP. However, many extended health insurance plans cover contact lenses, which may include ortho-k. We direct bill most major insurance providers for your convenience.
Ready to Try Ortho-K?
Book your ortho-k consultation to see if overnight lenses are right for you or your child.
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