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January 2, 2025
Insights from EssilorLuxottica’s Research at IMC 2024: Part II (click here for Part I)
Photo Credit: Shutterstock
Compiled by Shilpa Yalamanchili, Senior Global Professional Relations Manager, EssilorLuxottica; abstracts written by the original authors
Ongoing research into myopia and its management continues to make important strides, with new tools and technologies enhancing both our understanding and management of myopia progression. Recent studies presented by EssilorLuxottica at the International Myopia Conference (IMC) 2024 highlight the significance of objective measurement tools, innovative lens designs, and improved refraction methods. These advancements aim to provide more efficient strategies for managing myopia onset and progression. This article (and Part I) summarizes key studies from EssilorLuxottica’s R&D team.
- Validation of a Spectacle Frame for Measuring Wearing Time
Authors: Janice Yin Zhen TOH1, Damien Paillé1, Paul GIL2
Affiliations:
- R&D Singapore, EssilorLuxottica, Singapore, Singapore
- R&D France, EssilorLuxottica, France, Creteil
Summary:
The rising prevalence of myopia and its associated complications underscore the critical need for effective management strategies. Advances in spectacle lenses with lenslet-based designs have shown improved myopia progression control, with greater efficacy linked to extended wearing durations. Usually, wearing time is assessed through questionnaires, and we know that subjective and objective assessments can yield different results.
In this study, we present a smart frame designed to provide an objective measurement of wearing time. To validate its accuracy, we conducted an in-lab study using automated robotic testing to simulate alternating periods of “worn” and “not worn” states.
The results demonstrated an impressive overall accuracy of 99.58% in distinguishing between wearing and non-wearing periods, confirming the reliability of the smart frame as a tool for objectively monitoring wearing time. This technology has the potential to significantly enhance the evaluation of spectacle-based myopia management strategies, supporting more informed decision-making and guiding future advancements in the field.
- Visual Acuity and Contrast Sensitivity through Myopia Control Spectacle Lenses with Dual-Index Aspherical Lenslets (DIAL)
Authors: Damien Paillé1, Ee Woon Lim1, Matthieu Guillot2, Björn Drobe1
Affiliations:
- R&D Singapore, EssilorLuxottica, Singapore, Singapore
- R&D France, EssilorLuxottica, France, Creteil
Summary:
This study evaluated the impact of myopia progression control spectacle lenses incorporating Dual-Index Aspherical Lenslets (DIAL) on visual acuity (VA) and contrast sensitivity (CS), comparing them with spectacle lenses with highly aspherical lenslets (HAL) and single-vision spectacle lenses (SVL). The study involved testing VA and CS in adults wearing DIAL, HAL, and SVL lenses in random order. The results indicated that both DIAL and HAL lenses caused a reduction in visual acuity compared to SVL, although there was no significant difference between DIAL and HAL. Importantly, contrast sensitivity was unaffected by either lens design.
These results suggest that DIAL lenses, like HAL lenses, offer comparable visual performance while still providing the potential benefits of myopia progression control.
- 1-Year Myopia Control Efficacy of Spectacle Lenses with Dual-Index Aspherical Lenslets (DIAL)
Authors: Björn Drobe1, A. Tan1, H. Chua1, M. Guillot2, Y.L. Wong1
Affiliations:
- R&D Singapore, EssilorLuxottica, Singapore, Singapore
- R&D France, EssilorLuxottica, France, Creteil
Summary:
This one-year study, conducted in Singapore, evaluated the myopia progression control efficacy of spectacle lenses with DIAL technology in children aged 8-13 years. Eighty children with myopia were randomized to wear either DIAL or single-vision lenses (SVL), and axial elongation, refractive error, and best corrected visual acuity (BCVA) were measured at baseline and six-month intervals. Compared to SVL, children wearing DIAL lenses showed significantly less axial elongation (0.04 mm vs. 0.22 mm for SVL, P<0.001) and slower myopia progression (-0.13 D vs. -0.39 D for SVL, P=0.01). No significant differences were found between the two groups in terms of BCVA and daily wearing time. All participants adapted to the lenses within two to four days.
These results indicate that DIAL lenses may offer an effective option for managing myopia progression in children. Importantly, there were no significant differences in visual acuity or daily wear time between the DIAL and SVL groups, suggesting that the myopia progression control benefits of DIAL lenses can be achieved without compromising visual performance or patient compliance. While these findings are promising, further long-term studies are needed to fully assess the sustained efficacy of DIAL lenses and their potential role in broader myopia management strategies.
- Algorithm-based Subjective Refraction in Myopic and Pre-Myopic Children: A Comparison with Cycloplegic Subjective Refraction
Authors: Wee Sing Ong1, Andrew Kwok-cheung Lam2, Kenneth Ka-king Liu3
Affiliations:
- R&D Singapore, EssilorLuxottica, Singapore, Singapore
- The Hong Kong Polytechnic University
Summary:
This study aimed to assess the performance of an algorithm-based, non-cycloplegic subjective refraction method (SR1) for myopic and pre-myopic children, comparing it with the gold standard cycloplegic subjective refraction (SSR). Thirty-six myopic and 30 pre-myopic Chinese children, aged 6-13 years, were recruited and tested using both the SR1 and SSR methods with the Vision-R 800 phoropter. The Limits of Agreement (LoA) between the two methods were found to be within ±0.50 D, indicating reasonable agreement and suggesting that SR1 could offer a viable alternative to cycloplegic refraction. Although SR1 was slightly slower than SSR, the additional time it requires may offset the time needed for cycloplegia to take effect and avoid the temporary blurred near vision and discomfort commonly associated with cycloplegic eye drops.
While cycloplegic subjective refraction remains essential for accurately assessing refraction in pre-myopic and myopic children, this study highlights the potential of SR1 as a promising alternative. With reasonable agreement to SSR and no significant differences in refractive outcomes, SR1 offers a streamlined, algorithm-based approach that could enhance clinical workflow and improve patient experience, particularly for routine eye exams in pediatric populations. Further studies on a larger scale will be needed to refine and validate the algorithm and its broader applicability in pediatric clinical practice.
Conclusion
Part II of this review highlights significant advancements in myopia management technologies, including objective wear-time measurement systems, innovative lens designs, and improved refraction methods. These studies contribute to a deeper understanding of myopia progression and provide new opportunities for more personalized and effective management strategies. As these tools continue to evolve, they hold the potential to enhance clinical practices and support more tailored approaches to managing myopia. The ongoing research and innovations presented at IMC 2024 reflect EssilorLuxottica’s continued efforts to contribute to the advancement of myopia management, with the goal of supporting more efficient, accurate, and accessible solutions for addressing myopia onset and progression globally.
Click here for Part I
Disclaimer: Essilor Stellest lenses are currently not available in all countries.
