PretectalMyopia research / Evidence explorer
Explore the BLINK study
Compare the adjusted three-year outcomes from the 2020 BLINK trial. Switch outcomes to see why the measure matters.
Adjusted change in refraction (diopters). More negative values mean greater myopia progression.
Published adjusted difference; 95% CI 0.29 to 0.63 D.
Contrasts use the study's statistical model. They may differ from subtraction of rounded chart values.
View the numbers and study context
| Lens group | Refraction change | Axial growth |
|---|---|---|
| Single vision | -1.05 D | 0.66 mm |
| Medium add | -0.89 D | 0.58 mm |
| High add | -0.60 D | 0.42 mm |
294 children, aged 7-11 at enrollment; three years of follow-up. The primary outcome was myopia progression. Axial elongation was a secondary outcome. The chart shows endpoint means, not individual trajectories or confidence intervals. Medium-add vs. single-vision progression did not reach statistical significance (95% CI −0.01 to 0.33 D).
The idea to take away
High-add lenses slowed progression compared with single-vision lenses in this trial. Slower progression is not a reversal of myopia.
What this study can tell us
This trial enrolled 294 children aged 7-11 at two US centers. The results apply to the studied lenses, population, and follow-up period. Group averages do not predict an individual child's outcome or compare all myopia treatments.
What can we conclude from the high-add group?
Teach this research
Inspect a short presentation built from this study, including its question, evidence, and production notes.
Go to the source
References checked October 1, 2026The BLINK randomized clinical trial
Walline et al. · JAMA · 2020
Three-year comparison of high-add, medium-add, and single-vision contact lenses. DOI: 10.1001/jama.2020.10834.
Multifocal contact lenses slow myopia progression in children
National Eye Institute · 2020
An accessible introduction to the trial and its findings.