Myopia in Children: A Perth Parent's Guide

If your child has been told they are short sighted, or you have started to suspect it, this guide covers what myopia actually is, what to watch for, and what can be done about it. Each section links to a fuller article if you want to go deeper.

What myopia actually is

Myopia, or short sightedness, is usually not a problem with how the eye focuses. It is a problem with how long the eye has grown. The eye stretches slightly from front to back, so light comes into focus just short of the retina and distance blurs.

Glasses correct the blur. They do not stop the stretching, which is why the prescription keeps climbing year after year even when glasses are worn faithfully. We have written about why a child's prescription keeps getting worse in more detail.

What parents usually notice first

Children rarely report a vision problem, because they have no basis for comparison. If the board has always been blurry, that is simply what school looks like.

So the signs tend to be behavioural. Sitting close to the television, squinting at distance, complaining of tired eyes, holding books very close, or losing interest in activities that need distance vision. Many of the signs worth noticing have nothing to do with blurry vision at all.

Why it matters beyond thicker lenses

An eye that has stretched is structurally thinner, and that carries consequences across a lifetime rather than ending when the child stops growing.

Adults with high myopia carry meaningfully elevated lifetime risk of retinal detachment, glaucoma, earlier cataract and myopic macular degeneration. The risk broadly scales with how far the eye stretched during childhood, which is why the years between roughly six and sixteen matter so much.

What increases the risk

Genetics does most of the work. If one parent is short sighted the child's risk roughly doubles, and with two it climbs further again.

Environment contributes, and the most robust finding concerns time spent outdoors rather than screen time specifically. Around two hours a day outside appears protective, and the evidence points to outdoor light itself doing the work rather than any particular activity.

The management options

Several approaches now have good evidence for slowing axial elongation, which is the stretching itself, rather than simply correcting the blur it causes. We have compared ortho-K, atropine and myopia control lenses side by side, including the trade offs of each.

Orthokeratology. A rigid lens worn overnight reshapes the front surface of the eye, so the child sees clearly all day with nothing on their eyes. Parents usually want to know whether it is safe for children, what age a child can start, and whether they can still swim and play sport. Costs are commonly recovered through private health insurance extras rather than Medicare.

Low dose atropine. A single diluted drop each night. Nothing to insert or clean, which suits younger children not yet ready for lenses. Glasses are still worn during the day.

Myopia control soft lenses. Daily disposables with an optical design that signals the eye to slow its growth, worn during waking hours.

None of these reverse myopia. What they do is change the slope of the line, and across a decade of childhood that compounds into a materially different endpoint.

When to have your child's eyes examined

Before school, ideally around three or four, and sooner if you have noticed anything or if there is a family history. We have set out when a child should have their first eye examination and why waiting for the school screening is a mistake.

If the prescription has already increased two years running, the next review should involve more than a refraction. Ask about axial length measurement, which is a direct measurement of the eye's length and the number that genuinely tracks what is happening.

Where to from here

Myopia is manageable, and the earlier it is managed the more there is to gain, because progression is fastest in the youngest children.

At Noranda Optometrist we measure axial length, map the likely trajectory, and build a management plan around the individual child. If your child's prescription has changed again this year, that is the appointment worth booking.