THE MYOPIA CLINIC · CONCORD EYECARE

When your child's eyesight keeps getting worse

Progressive myopia isn't just "needing stronger glasses." It's a pattern — and understanding it is the first step to changing it.

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Reviewed by Dr Nikki Peng & Dr Vivian Li · Last updated May 2026

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Axial Length Monitoring
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WHAT IS PROGRESSIVE MYOPIA?

Not a separate condition — a pattern of change

Progressive myopia is when a child's short-sightedness increases year after year as the eye grows longer than it should. It's not a different disease from myopia — it's the same condition on an accelerating trajectory. The faster it progresses, the higher the risk of eye health complications in adulthood.

Every eye has a length — measured from the front of the cornea to the retina at the back. In myopia, the eye is slightly too long, so light focuses in front of the retina instead of on it. That's what causes the blur.

In progressive myopia, the eye keeps growing. Each millimetre of extra length shifts the prescription further. This is why your child needs new glasses every year — the eye is physically changing shape.

Standard glasses correct the blur, but they don't address the growth. That's an important distinction — and it's why understanding what myopia actually is matters before deciding what to do about it.

We track this growth directly with axial length measurement using the Zeiss IOLMaster 500 — because prescription alone doesn't tell the full story.

WHY DOES MYOPIA GET WORSE IN SOME CHILDREN?

Age, genetics, and how they use their eyes

Children who become myopic before age 9 tend to reach higher prescriptions by adulthood. Genetics play a strong role — one myopic parent roughly triples the risk, two parents increase it six-fold. But environment matters too: less outdoor time and more sustained near work accelerate progression, especially during growth spurts.

Age of onset is the strongest predictor. A child who becomes myopic at six has many more years of eye growth ahead than one who starts at twelve. More years of growth means a higher final prescription — and a higher risk of complications. This is why early detection matters so much.

Genetics set the baseline. If one parent is myopic, their child's risk roughly triples. If both parents are, the risk increases six-fold (Mutti et al., 2002). Ethnicity also plays a role — the Sydney Myopia Study found that 42.7% of East Asian children were myopic by age 12, compared to 4.4% of European children (Rose et al., 2008).

Environment accelerates the timeline. Less than two hours of outdoor time per day significantly increases myopia risk. Sustained near work — screens, reading, devices held close — adds to the load. These factors don't cause myopia on their own, but they can turn moderate progression into fast progression.

Growth spurts matter. Myopia progression isn't always predictable from year to year.

"Progression isn't always a straight line. We see children whose prescription barely changes for a year or two, then jumps significantly — often catching up to the average rate. Growth spurts and changes in visual habits both play a role, which is why we monitor every six months rather than just once a year."