If your child needs a stronger prescription every year, you may have wondered whether anything can be done to slow it down. Orthokeratology — known as Ortho-K — is a clinically proven method that not only corrects your child’s vision overnight but is shown to significantly slow the progression of myopia. This guide explains how it works, who it can help, and what to expect.
What Is Myopia — and Why Does It Keep Getting Worse?
Myopia (short-sightedness) occurs when the eye is slightly too long, causing distant objects to appear blurred. In children and teenagers, the eye continues to grow — and as it does, the prescription typically worsens each year. This is called myopia progression.
Unchecked myopia progression is not just a spectacle inconvenience. High myopia (above −6.00D) is associated with significantly increased lifetime risk of retinal detachment, glaucoma, and other sight-threatening conditions. Slowing progression during childhood directly reduces this long-term risk.
Myopia prevalence among urban school-age children in India has roughly doubled in a generation. Children with at least one myopic parent, myopia onset before age 10, or a prescription worsening by 0.50D or more per year are at highest risk of developing high myopia without active management.
What Is Orthokeratology?
Orthokeratology (Ortho-K) uses specially designed rigid contact lenses worn only during sleep to gently reshape the surface of the cornea overnight. In the morning, the lenses are removed. The cornea retains its reshaped form throughout the day — providing clear unaided vision without glasses or daytime contact lenses.
Worn overnight only
NightFlex Ortho-K lenses are worn for approximately 8 hours during sleep. No daytime lenses are needed — your child wakes up, removes them, and their vision is clear.
Clear all-day vision
Within the first 1–2 weeks of nightly wear, most children achieve clear unaided vision throughout the day — ideal for school, sport, and outdoor activity.
Clinically proven myopia control
Clinical studies consistently show 43–50% reduction in axial eye growth in children wearing Ortho-K compared to those wearing spectacles — the key measure of myopia progression.
The Ortho-K lens creates a distinctive corneal shape: flattened centrally (correcting the prescription) with a ring of increased curvature in the mid-periphery. This peripheral ring focuses light in front of the peripheral retina — a signal believed to suppress the stimulus driving eye growth. This mechanism is called peripheral myopic defocus, and it is the same principle behind dedicated myopia control soft lenses.
Who Can Benefit from Ortho-K?
- Children aged 6–16 with documented myopia progression (worsening by 0.50D or more per year)
- Myopia in the range −0.50D to −6.00D
- Children active in sports or outdoor activities where glasses and daytime lenses are inconvenient
- Children bothered by the appearance or inconvenience of spectacles
- Adults with myopia up to −6.00D who want daytime freedom from glasses and lenses
- Families seeking an evidence-based, active approach to myopia management
NightFlex Orthokeratology Lenses — Available in India
Cosmos Enterprises is the authorised distributor for NightFlex Orthokeratology Lenses in India, manufactured in Switzerland by Appenzeller Kontaktlinsen AG and CE certified to European medical device standards.
| Parameter | Detail |
|---|---|
| Regulatory approval | CE Certified (Europe) |
| Correction range | Up to −6.00D (case-dependent) |
| Astigmatism correction | Up to −1.75D with-the-rule |
| Manufacturing standard | ISO 18369 |
| Country of manufacture | Switzerland |
| Wear schedule | Overnight only — removed each morning |
What to Expect
Ortho-K fitting typically involves three to four visits:
- Corneal assessment — topography and refraction measurements map your child’s eye surface before lens selection
- Trial fitting — a lens is placed and the fit assessed; initial corneal response is evaluated
- Dispensing — the final lenses are delivered with full insertion and cleaning training for your child (and parent)
- Follow-up — a check is scheduled the morning after first overnight wear, then at one week and one month
Most children adapt within 7–14 nights of nightly wear. Cosmos Enterprises provides dedicated clinical support throughout the fitting and follow-up process.
Interested in Ortho-K for your child?
Contact Cosmos Enterprises for product information, fitting support, or to find a trained practitioner near you.
Cosmos Enterprises is the authorised regional distributor for NightFlex Orthokeratology Lenses (CE Certified, Switzerland — Appenzeller Kontaktlinsen AG) and Soft ProAssist myopia control lenses in India.