Orthokeratology: See Clearly All Day Without Glasses or Daytime Contacts

Imagine waking up in the morning and being able to see clearly — without reaching for your glasses or putting in contact lenses. For patients with mild to moderate myopia (nearsightedness), orthokeratology makes this possible.

Orthokeratology — commonly called ortho-k — uses specially designed rigid gas-permeable contact lenses worn during sleep to gently and temporarily reshape the cornea. When you remove the lenses in the morning, your cornea retains the new shape throughout the day, providing clear vision without any daytime correction.

The cornea is the clear, dome-shaped front surface of the eye. Its curvature is one of the primary determinants of your refractive error — in myopia, the cornea is too steep (or the eye is too long), causing light to focus in front of the retina rather than on it.

Ortho-k lenses have a reverse geometry design — the back surface of the lens is shaped to gently flatten the central cornea while creating a peripheral ring of increased curvature. Worn during sleep, the lens applies gentle hydraulic pressure to the tear film beneath it, gradually redistributing the epithelial cells of the cornea to create a flatter central profile.

The effect is temporary — the cornea gradually returns to its original shape over 1–2 days without the lenses. This means ortho-k must be worn every night (or every other night for some patients) to maintain the effect.

Ortho-k is an excellent option for adults who want the freedom of clear daytime vision without glasses or contacts — particularly those who are not candidates for LASIK (due to thin corneas, dry eye, or prescription outside the LASIK range) or who prefer a reversible option.

Ortho-k is popular with swimmers, martial artists, contact sport athletes, and others for whom glasses are impractical and daytime contact lenses are inconvenient or risky.

Because ortho-k lenses are worn during sleep — when the eyes are closed and the tear film is not subject to evaporation — they are often well-tolerated by patients with dry eye who cannot comfortably wear daytime contact lenses.

This is one of the most important applications of ortho-k. Multiple clinical studies have demonstrated that ortho-k slows the progression of myopia in children and teenagers — by 30–60% compared to standard glasses or soft contact lenses.

The mechanism is related to the peripheral defocus created by the ortho-k lens: the peripheral ring of increased curvature creates a myopic defocus signal in the peripheral retina that appears to slow axial elongation (the eye growing longer, which drives myopia progression).

For parents concerned about their child's rapidly progressing myopia — and the associated long-term risks of high myopia (retinal detachment, glaucoma, macular degeneration) — ortho-k is one of the most evidence-based myopia control options available.

Ortho-k fitting requires detailed corneal topography mapping to design lenses that precisely match the corneal shape. The fitting process typically involves:

1. Corneal topography and refraction
2. Trial lens fitting and overnight wear
3. Follow-up topography the next morning to assess the reshaping effect
4. Lens modification as needed to optimize the result
5. Final lens order and training

Most patients achieve functional daytime vision within the first few nights of ortho-k wear. Full correction typically stabilizes within 1–2 weeks. During the adaptation period, vision may be slightly variable during the day.

Ortho-k lenses require careful daily cleaning and disinfection. Follow-up visits every 6–12 months are recommended to monitor corneal health and lens fit.

Ortho-k has an excellent safety record when lenses are properly fitted, worn, and cared for. The primary risk — as with all contact lens wear — is microbial keratitis (corneal infection). This risk is minimized by:

• Strict hand washing before lens handling
• Daily lens cleaning and disinfection
• Regular follow-up visits
• Replacing lenses on the recommended schedule (typically every 1–2 years)

Call (702) 479-5222 or schedule an ortho-k consultation at Trendsetter Eyewear in Summerlin, Las Vegas. Dr. Cynthia Payne will assess whether ortho-k is right for you or your child.