WEDNESDAY, Aug. 12, 2020 (HealthDay News) -- Among children with myopia, treatment with high add power multifocal contact lenses reduces the rate of myopia progression over three years compared with medium add power multifocal and single-vision contact lenses, according to a study published in the Aug. 11 issue of the Journal of the American Medical Association.
Jeffrey J. Walline, O.D., Ph.D., from The Ohio State University College of Optometry in Columbus, and colleagues randomly assigned 294 consecutive eligible children (aged 7 to 11 years) with spherical component myopia to wear high add power (+2.5 D; 98 children), medium add power (+1.5 D; 98 children), or single-vision (98 children) contact lenses.
The researchers found that adjusted three-year myopia progression was −0.60 D for high add power, −0.89 D for medium add power, and −1.05 D for single-vision contact lenses, with differences in progression of 0.46 D for high add power versus single-vision contact lenses, 0.30 D for high add versus medium add power contact lenses, and 0.16 D for medium add power versus single-vision contact lenses. Of the four secondary end points, there were no statistically significant differences between the groups for three of the end points. Three-year adjusted mean eye growth was 0.42 mm for high add power, 0.58 mm for medium add power, and 0.66 mm for single-vision contact lenses, with differences in eye growth of −0.23 mm for high add power versus single-vision contact lenses, −0.16 mm for high add versus medium add power contact lenses, and −0.07 mm for medium add power versus single-vision contact lenses.
"Further research is needed to understand the clinical importance of the observed differences," the authors write.
Several authors disclosed financial ties to Bausch + Lomb, which provided contact lens solutions for the study.