Two years, one insight: How lens design changes shape myopia control
The Battle Against Myopia: A Two-Year Study on Lens Design Innovation
Myopia, a global health concern, affects children worldwide, leading to irreversible vision complications. While optical interventions like specialized lenses show promise, their effectiveness often wanes after the first year. A groundbreaking two-year study introduces a novel spectacle lens design with microscopic lenslets, significantly slowing myopia progression and axial elongation compared to standard single-vision correction. The study's key finding? Switching lens designs after the first year further reduces eye elongation during the second year, challenging the notion of neural adaptation to persistent optical signals.
The Study: A Dynamic Approach to Myopia Control
Researchers from Wenzhou Medical University and collaborating institutions conducted a two-year randomized clinical trial, following 218 myopic children aged 6-12 who wore Lenslet-ARray-Integrated (LARI) spectacle lenses with positive or negative power lenslets. The study compared children who continued the same lens design to those who switched after the first year, exploring the impact of altering optical cues on long-term myopia control, particularly in slowing axial eye elongation.
Results: Sustaining Structural Benefits
Children wearing LARI lenses demonstrated significantly less myopia progression and eye elongation compared to those with conventional single-vision lenses. The LARI groups' average axial elongation ranged from 0.33 to 0.44 mm, significantly lower than the control group's extrapolated values. While the protective effect on refractive error weakened in the second year, the reduction in eye elongation persisted, suggesting that varying optical signals may sustain the structural benefits of myopia control strategies.
The Power of Lens Switching
The study's innovative aspect was its investigation of lens switching. Children who changed lenslet designs after the first year exhibited smaller axial elongation during the second year compared to continued single-vision correction. However, refractive error changes remained consistent regardless of design switching or lens retention.
Beyond Traditional Theories: A New Perspective
The findings challenge traditional optical defocus theories, as both lenslet designs produced comparable retinal image modulation, despite their opposite powers. This suggests that alternating optical signals may counteract the decline in treatment efficacy often associated with prolonged single-intervention use.
Implications for Clinicians and Patients
One senior investigator emphasized the study's shift in long-term myopia control thinking. Adjusting visual signals may sustain structural benefits, particularly in slowing eye growth. For children less responsive to single optical interventions, switching lens designs offers a strategy to slow eye elongation without increasing treatment burden. While lens switching alone may not prevent refractive progression, it can be combined with other approaches for enhanced control.
This dynamic, adaptive approach to myopia management acknowledges biological adaptation and emphasizes long-term structural outcomes for lifelong eye health.
References and Funding
The study's DOI is 10.1186/s40662-025-00462-0. It was supported by Shanghai VisionXlab Medical Technology Co., Ltd. (Eye Hospital, Wenzhou Medical University, grant number KJZX0263).
Disclaimer
EIN Presswire provides this content without warranty, ensuring accuracy and transparency. Any inquiries should be directed to the author, Lucy Wang, via the provided contact information.
