Overnight lenses: Can Ortho-K help children get rid of glasses?

Orthokeratology uses overnight rigid lenses to temporarily reshape the cornea and clear daytime vision. The technique is drawing interest for myopia management, but strict hygiene and regular monitoring remain essential.What if you could put contact lenses on before bed, sleep in them and wake up able to see clearly without glasses? That is the appeal of orthokeratology, or Ortho-K – specially designed rigid gas-permeable lenses that temporarily reshape the cornea while you sleep, providing clearer vision during the day.The technique is gaining attention, particularly among parents looking for ways to manage myopia, or short-sightedness, in children and teenagers. Unlike LASIK, it requires no surgery and its effects are reversible.Ortho K lenses are mainly used in myopia, astigmatism (blurry or distorted vision), sometimes in hypermetropia (farsightedness), too, said Dr Shreyans P Kothari, an ophthalmologist with Agarwal Eye Hospital.“The best part is, unlike LASIK surgery, the effects are reversible.” Before prescribing the lenses, an ophthalmologist performs corneal topography to map the shape and curvature of the cornea. Each lens is then custom-designed for the individual eye. When worn overnight, it gently alters the shape of the outer corneal layer.After the lens is removed in the morning, the temporary reshaping allows light to focus more accurately on the retina, giving clearer vision through the day. The effect, however, is not permanent. If the lenses are discontinued, the cornea gradually returns to its original shape. MORE THAN BREAK FROM GLASSESFor children, the interest in Ortho-K is not just about going spectacle-free. There is growing concern over childhood myopia and its progression, particularly as more children develop the condition at younger ages.Dr Rishi Bharadwaj, senior consultant, ophthalmology, Paras Health, Gurugram, said Ortho-K is increasingly being considered as a myopia-management option. Studies suggest that in appropriately selected children, it may reduce myopia progression by around 50–60% in some cases, although the response differs between individuals.That makes the treatment potentially useful for two reasons: it can provide clear daytime vision while also helping slow the worsening of myopia.The convenience can be particularly attractive to children who play sports or spend considerable time outdoors, where spectacles can be cumbersome. Adults who do not want glasses or daytime contact lenses may also opt for it.But Ortho-K should not be confused with a permanent cure. The benefit has to be maintained through regular overnight lens wear. The initial fitting can also take time.Several lenses may need to be tried or adjusted before the right fit is achieved, while the full vision-correction effect can take around two weeks to develop. The lenses can also feel uncomfortable initially because they are rigid. Most users gradually adapt to the sensation.THE HYGIENE TRADE-OFFThe biggest concern with the lenses is the risk of infection. Because the lenses sit directly on the eye for several hours while the person sleeps, poor cleaning or handling can have serious consequences.“The commonest problem with using these lenses is the increased risk of infective keratitis, which can be fatal to sight,” Dr Kothari said.Strict hygiene is therefore essential. Hands must be washed before handling the lenses, and the lenses need to be cleaned and stored correctly. Regular follow-up with an eye-care professional is equally important.This is particularly relevant for children, who may need parents to supervise lens handling and cleaning. Ortho-K is not something that should be self-fitted or used without professional monitoring.Not everyone is a suitable candidate either.An ophthalmologist needs to consider the degree of refractive error, corneal shape, overall eye health and whether the patient can reliably follow the cleaning and follow-up routine.A PROMISING MIDDLE PATHThe attraction of Ortho-K lies in the middle ground it offers: daytime freedom from glasses without undergoing permanent refractive surgery.For a child with progressing myopia, it may offer an additional tool to help slow the condition. For an athlete or adult who dislikes spectacles, it can provide clear daytime vision without wearing contact lenses throughout the day.Its reversibility is another advantage. Unlike LASIK, which permanently changes the cornea, these lenses produces a temporary change. Stop wearing the lenses and the cornea generally moves back towards its original shape.But that is also its limitation.There is no one-time procedure that makes myopia disappear. The lenses have to be worn consistently to maintain the effect, and careful eye care remains non-negotiable.- EndsPublished On: Aug 17, 2026 16:27 IST