Visual Quality Indicators with Multifocal and Dual-Focus Soft Contact Lenses for Myopia Control

Purpose. The purpose of this study was to determine and compare visual quality indicators in eyes wearing multifocal center-distance, and dual-focus soft contact lenses that are specifically designed for the purpose of myopia progression management, as well as single-vision soft contact lenses. Material and Methods. Visual quality indicators of 34 eyes of healthy, young myopic adults ages 20 to 35 were determined. Non-cycloplegic measurements were conducted without contact lenses (baseline) and while subjects wore soft multi- focal center-distance soft contact lenses (ArtMost SoftOK SMR and SEED 1-day Pure UP Multistage daily disposable), dual-focus soft contact lenses (CooperVision MiSight 1 Day), and single-vision soft contact lenses (iLens Aqua Bi-weekly). In this study, the lenses were referred to as SoftOK, Pure UP, MiSight, and iLens. The measured and analyzed visual quality indicators included high-contrast distance and near visual acuity, stereopsis, accommodative amplitude, accommo- dative response, spherical aberration, and horizontal coma. Results. High-contrast distance and near visual acuities, accommodative responses, and stereopsis values achieved with the SoftOK, Pure UP, and MiSight contact lenses werecomparable to those achieved with the iLens single-vision soft contact lenses and to baseline values. Accommodative amplitude was slightly reduced with the MiSight contact lens and spherical aberration was significantly higher with the SoftOK lens compared to the other lenses. Both findings had statistical significance (P = 0.047 and P < 0.001, respec- tively). Horizontal coma, most likely resulting from slight lens decentration, was higher and more variable with the SoftOK lens compared to the other lenses, although no statistical significance was determined. Conclusion. Dual-focus and multifocal center-distance soft contact lenses allow for good visual quality, especially clear vision at distance and near. Small differences in accommoda- tive amplitude and spherical aberration were found between lens designs, however the clinical impact requires further investigation. Keywords myopia management, soft multifocal contact lens, visual quality indicators, spherical aberration, accommodative amplitude