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Orthokeratology (Ortho-K or OK lens) is a corneal refractive therapy that can effectively slow down the progression of myopia in children or teenagers. It utilizes a highly gas permeable hard contact lens to flatten the front surface of the cornea (the clear part of the eye), which is reversible. It is worn at night when sleeping, and during the day, the individual will be able to see clearly without glasses or contact lenses.
Myopia, more commonly known as nearsightedness, is due to the eyeball being physically too long, or the cornea being too steep. Glasses and typical contact lenses correct the vision by bending light to properly focus on the macula (the central vision area of the eye). The image that is produced by glasses or typical contact lenses, however, is defocused on the peripheral retina, which can signal the eye to grow longer. As a result, the eye becomes more nearsighted.
Ortho-K uses the tear film force to reshape the front surface of the cornea to imitate laser surgery. The image that is produced by the flat cornea is in focus with the peripheral retina, thus discouraging elongation of the eye.
If you are not satisfied with the results, you simply discontinue sleeping with the lenses and your original prescription will gradually return. Ortho-K is most effective for patients with mild to moderate myopia and low levels of astigmatism.
Ask our optometrists for more information if you’re interested in this extremely low risk treatment!
- Myopia Control- MiSight
Myopia, commonly known as nearsightedness, has rapidly increased over the past years. Although genetics play a strong role in one’s cause of myopia, it appears that environmental factors, such as increased hours of close up tasks, can also contribute to the increased prevalence.
Aside from orthokeratology (Ortho-K or OK lens), MiSight, a soft daily disposable contact lens by CooperVision, has shown to reduce the rate of myopia progression by up to 59% in children. This lens works by providing a focused image on the central vision area, and a peripheral image that is focused in front of the peripheral retina to signal the eye to not grow as much, hence slowing down the prescription change. Daily disposable lenses are ideal for children because parents do not need to worry about hygiene, which can increase risk of infections, and damaged lenses are easily replaceable.
A new non-invasive award winning technology, D.I.M.S (defocus incorporated multiple segments), is now available to help control myopia progression. With a proven 2 year clinical trial, this technology has shown to slow myopia progression by 59%.
The lens has multiple segments of honeycomb defocus areas to evenly distribute myopic defocus with eye movement. This can help effectively control myopia progression. The lens is made of a polycarbonate material, which is highly impact resistant.
Hoya Vision Care partnered with Hong Kong Polytechnic University to bring this innovative lens technology to Canada.
For more questions regarding Miyosmart, contact our office to speak with our Optometrist.