Two-stage fitting for moderate myopia
Why a second, refined lens can sharpen the result.
The cornea changes as treatment works
Part 03 · 01- 01
Ortho-K redistributes the surface
That gently changes the cornea’s profile, including its overall height, called sagittal depth or “sag”.
- 02
The first lens fits the untreated eye
After a few weeks, the cornea it sits on has subtly changed.
- 03
Moderate myopia shifts more
More correction means more reshaping, so a fit that was right on night one can drift.
Two stages, one result
Part 03 · 02Stage one lens
Designed from your baseline corneal map to start treatment.
Settle
Usually around 2–4 weeks of nightly wear while the cornea adapts.
Re-measure
Topography and vision show how the treated cornea has changed.
Stage two lens
A refined lens designed for the treated cornea, for long-term wear.
Timing varies from person to person. The second lens is part of the plan from the start, not a sign that something went wrong.
Why it’s worth the extra step
Part 03 · 03Better long-term centring
The final lens is matched to the cornea it will actually sit on.
Fuller correction
Fine-tuning helps reach the target prescription and keep it through the day.
Fewer surprises later
Building the refit into the plan avoids unplanned changes months down the track.
In summary
Part 03- 01Treatment subtly changes the cornea’s height and shape.
- 02In moderate myopia, a second lens is designed for the treated cornea.
- 03The result is a better-centred, more stable long-term fit.
Book an ortho-K assessment.
We map your cornea first, then design the lens around it.
General information only, not personal advice. Suitability for ortho-K is decided after a full eye examination and corneal mapping.