APR 29, 2022
Investigators evaluated whether aspherical lenses slowed myopia progression throughout 2 years of use and whether the level of lens asphericity had an effect on myopia control efficacy.
This was a prospective, double-masked, randomized clinical trial conducted in China from July 2018 to October 2020, with 170 children with myopia aged 8 to 13 years assigned to 1 of 3 groups: single-vision spectacles (control), slightly aspherical lenses (SAL), and highly aspherical lenses (HAL). Two-year data were analyzed for changes in axial length and spherical equivalent refraction (SER).
During the 2-year period, aspherical lenses decreased myopia progression (in terms of SER) and axial length to a larger extent than single-vision spectacles, with the HAL group having the greatest reductions. There were significant associations between age and SER progression and axial length elongation.
The study was performed in China with a relatively homogenous population. Also, the amount of time the glasses were worn was self-reported and therefore was not objective.
Aspherical lenses decreased the progression of myopia in this study, indicating that they may be a more viable option (with increased compliance) than contact lenses or atropine eye drops for children with myopia.