Is Orthokeratology Safe for My Child?

This is almost always the first question, and usually it arrives with an unspoken second one attached. Sleeping in a contact lens sounds like something you are not supposed to do, and a parent is being asked to authorise it for a child who cannot properly weigh the risk themselves.

It deserves a direct answer rather than reassurance.

The risk that matters

There is one complication that genuinely matters in contact lens wear of any kind, and that is microbial keratitis, an infection of the cornea. Everything else is either minor, temporary, or manageable at a routine review.

Microbial keratitis is uncommon but it is serious, because an infection at the centre of the cornea can leave scarring that permanently affects vision. This is the risk that any honest discussion of orthokeratology has to start from.

The best available estimates put the incidence in orthokeratology at somewhere in the region of one to two cases per thousand patients per year of wear. Put the other way, well over nine hundred and ninety in every thousand wearers will go through a year without incident. The figure is broadly comparable to overnight wear of soft contact lenses and higher than daily disposable wear, which is the safest lens modality available.

Those numbers are worth sitting with rather than skipping past. The risk is small, it is not zero, and it is not fair to present it as though it were.

What the risk is weighed against

The reason parents still proceed, in large numbers, is that the alternative is not risk free either.

Uncontrolled myopia progression carries its own consequences, and they are lifelong. A child who reaches adulthood at a high prescription carries substantially elevated risk of retinal detachment, glaucoma, early cataract and myopic macular degeneration, and those risks compound over decades rather than resolving.

So the decision is not between a small risk and no risk. It is between a small, manageable, largely preventable risk now, and a larger structural risk later. Reasonable parents reach different conclusions about that trade off, and part of our job is to give you the information rather than the conclusion.

Why most infections are avoidable

The important detail about microbial keratitis in orthokeratology is that the cases which do occur are overwhelmingly associated with identifiable lapses in handling. This is not a random event that strikes without warning. It follows patterns.

Water is the largest single factor. Rinsing lenses under a tap, storing them in tap water, topping up solution rather than replacing it, or swimming in lenses all introduce organisms that the eye handles poorly, and Acanthamoeba in particular is both water associated and extremely difficult to treat. The rule in our practice is absolute. Nothing but the prescribed solution ever touches the lens.

Case hygiene is the second. Cases are a reservoir, they are frequently neglected, and they need to be cleaned, air dried face down and replaced on schedule.

Sleeping in a lens while unwell, particularly with a cold or an eye that is already red, is the third.

Handled properly, with the protocol followed consistently, the risk sits at the low end of the range rather than the high end.

How it is monitored

Children in orthokeratology are not fitted and forgotten. They are reviewed the morning after their first night, again within the first fortnight, and then at regular intervals through the year. At each visit we examine the corneal surface under magnification and image the shape of the cornea, which shows both how the treatment is performing and whether the tissue is tolerating it.

Parents are also taught what to act on. The rule we give families is simple and it works. If the eye is red, painful, unusually light sensitive, or the vision has dropped, the lens comes out and we see them that day. Almost every serious outcome in the literature involves a delay between the first symptom and the first phone call.

The reassuring part

Orthokeratology is reversible. The lens reshapes the front surface of the cornea temporarily, and if wear stops, the cornea returns to its original shape over a period of days to a couple of weeks. Nothing about the fitting is permanent or structural, and there is no surgical step to undo.

It is also worth noting that children are frequently better at the handling routine than their parents expect. It becomes part of the bedtime and morning sequence quite quickly, and adherence in this age group is often better than in adults.

Where to from here

The honest summary is this. There is a real but small risk, it is meaningfully reduced by handling the lenses correctly and reviewing regularly, and it is weighed against a lifelong risk that does not go away on its own.

At Noranda Optometrist we go through this properly with parents before anything is fitted, including the parts that are less comfortable to discuss. If you are considering orthokeratology for your child and want the full picture before deciding, that is exactly the conversation to book.

This article is general information and is not a substitute for an eye examination. Please book a consultation to discuss your child's suitability.