Orthokeratology (also referred to as Ortho-K, OK, Overnight Vision Correction, Corneal Refractive Therapy, CRT, and Gentle Vision Shaping System, GVSS) is the fitting of specially designed rigid gas-permeable contact lenses to temporarily reshape the cornea to improve vision. Ortho-k lenses are worn overnight. While you are asleep, the lenses reshape the front surface of your eye (cornea). After removing the lenses in the morning, most patients go all day and into the evening without lenses or glasses. Each lens is made with special materials that keep your eye healthy and comfortable. The therapy is non-surgical and reversible. This treatment is available through our trusted optical care provider in Elmhurst, New York, for patients seeking a safe, effective alternative to daytime lenses or surgery. When you stop wearing your eyeglasses, your vision reverts to its original prescription. Most people with mild to moderate myopia (with or without mild astigmatism) are good candidates for orthokeratology.
Ortho-k lenses are prescribed for two purposes:
- To correct refractive errors (primarily nearsightedness, but also astigmatism and hyperopia). In some cases, ortho-k is also used to correct presbyopia.
- To slow the progression of childhood myopia.
At Visual Ophthalmology, we use a special device called a corneal topographer to get a digital map of your eyes. After that, we import that data into an advanced software (WAVE Contact Lens System) to design fully customized rigid contact lenses to achieve an exact fit and optimal results.
How Ortho-K Can Improve Daily Living
Many people find the freedom from glasses or daytime contact lenses to be life-changing. Activities like swimming, running, or simply working without visual aids become easier and more comfortable. Because the reshaping effect typically lasts throughout the day, vision remains sharp and stable without constant correction. Ortho-K is especially beneficial for those with active lifestyles or specific occupations where glasses or contacts are inconvenient. Regular follow-ups ensure continued effectiveness and eye health over time.
Is Orthokeratology the Right Fit?
Ortho-K is suitable for patients with mild to moderate myopia, hyperopia, or astigmatism, particularly those who are not ideal candidates for refractive surgery. Children with rapidly progressing myopia often respond well to the treatment, which may help reduce long-term vision deterioration. Adults seeking a flexible, reversible vision correction method may find it appealing. This treatment requires patient commitment to nightly wear and ongoing care, but the convenience and non-permanence attract many. Consultation and corneal topography help determine candidacy and lens design.
Frequently Asked Questions
This section addresses common questions about orthokeratology and provides helpful information for those considering this non-surgical vision correction option.
What types of vision problems can Ortho-K correct?
How long do the effects of Ortho-K last during the day?
Is Ortho-K safe for children?
How often are follow-up visits required with Ortho-K?
Can Ortho-K be used instead of LASIK?
What should be expected during the fitting process?
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