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Orthokeratology (Ortho-K) Comfort

One of the challenges that ortho-k patients, especially younger ones, often face is the initial discomfort associated with the treatment. Ortho-k, which aims to correct myopia and astigmatism by reshaping the cornea’s front surface using rigid lenses, can be likened to the early stages of using Invisalign for teeth straightening. During this period, the difference between the starting point and the final goal is most pronounced, resulting in discomfort.

To enhance lens comfort, improve patient compliance, and optimize the effectiveness of ortho-k lenses, several key factors come into play:

Choosing the Right Lens Material

Selecting a highly gas-permeable lens material is crucial in ortho-k treatment. This choice allows for maximum oxygen flow to the closed eye, preventing corneal hypoxia—a condition that not only reduces the effectiveness of ortho-k but can also pose risks to eye health. Optometrists often caution against sleeping in certain types of contact lenses for this reason. Another important attribute in lens materials is a “low wetting angle.” A lower wetting angle ensures that water spreads evenly across the lens surface, resulting in a more comfortable lens and facilitating the hydraulic forces involved in ortho-k treatment.

Edge Geometry Matters

The edge of the lens is what patients feel most frequently. Every blink reminds them of it, and if the lenses are inserted incorrectly, they may experience discomfort in the conjunctiva or even the cornea. Therefore, it’s essential to have an edge that gently tapers away from the cornea rather than digging into it, reducing the risk of the lens feeling uncomfortable. The shape of the edge is equally important, with rounded edges, like those used in ortho-k lenses, being less likely to cause discomfort or injury.

Perfect Alignment Fitting

Achieving a precise alignment fitting of the mid-peripheral cornea is crucial for ortho-k success. At Eyecare 24/7, optometrists can accurately map the patient’s cornea and design custom ortho-k lenses. These lenses often feature non-spherical toric alignment curves, recognizing that not all corneas and prescriptions are the same, and that each eye may have unique characteristics. While custom-made lenses may take a bit longer to produce, usually up to three weeks, they reduce the need for remakes and follow-up fittings, ultimately increasing patient comfort and satisfaction.

Contact Us

Love the way your child sees with Ortho-K – contact us at +65 6244 4420 or click here to for further inquiries.

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