Myopia Progression Calculator

Predict how fast myopia is progressing, estimate future axial length, and compare the impact of 9 treatments — including MiSight, Stellest, orthokeratology, and atropine. Used by optometrists and parents worldwide.

What does this calculator show?

• Annual progression rate — diopters/year and mm/year from two axial length measurements
• Projected axial length at age 18 — with and without treatment
• Percentile ranking — how the child compares to age-matched normative data
• Treatment comparison — expected AL at 18 for each of 9 modalities
• Risk score — composite risk from 5 weighted clinical factors

What is considered fast myopia progression?

Myopia progression of 0.50–1.00 diopters per year is considered rapid, especially in children under 12. By axial length, growth above 0.30 mm/year raises clinical concern. Children who onset before age 7 are at highest risk of high myopia by adulthood.

👉 What is fast myopia progression? Full clinical guide

Who should use this calculator?

• Optometrists — clinical decision support for treatment selection and parent communication
• Parents — understand your child's risk and treatment options before the next eye exam
• Researchers — compare expected treatment effects using published RCT data

How does the calculator work?

The calculator uses normative axial length data from Tideman et al. 2018 (European, n=5,766) and Sanz Diez et al. 2019 (Chinese schoolchildren), ethnicity-adjusted. Treatment efficacy values are derived from published RCTs including BLINK, ATOM2, LAMP, and MiSight trials.

FAQs

Is 1 diopter per year myopia progression fast?

Yes. 1.00 D/year is considered rapid progression. Children progressing this fast typically benefit from immediate myopia control intervention. The MyopiaTracker calculator flags this as high-risk and recommends treatment escalation.

Can myopia progression be stopped?

Not entirely, but it can be significantly slowed. Best evidence: Stellest (67% reduction), MiSight (59%), low-dose atropine 0.05% (50-67%), orthokeratology (45%). Starting earlier produces better outcomes.

What axial length is high myopia?

High myopia is defined as axial length ≥26.0 mm (approximately -6.00 D). Each additional mm of axial length increases risk of myopic maculopathy, glaucoma, and retinal detachment significantly.

Related tools

• Axial length percentile chart by age
• Compare myopia treatments — 9 modalities ranked
• Simple myopia calculator
• What is fast myopia progression?
• Do glasses make myopia worse?

Disclaimer: General information only — not medical advice. Results are population-level estimates. Always consult a qualified eye care professional for diagnosis and treatment decisions.