The Adaptation and Acceptance of Defocus Incorporated Multiple Segment Lens for Chinese Children

Abstract Purpose To investigate the adaptability and acceptance of a novel spectacle lens design that was recently reported to achieve a significant anti-myopia effect. Design A prospective, cross-over study Methods Twenty children were recruited to wear both Defocus Incorporated Multiple Segments (DIMS) lenses and single vision (SV) lenses, with a random assignment of which type of lenses was experienced first. For each type of lens, high and low contrast central distant visual acuity (VA), high contrast mid-peripheral near VA were measured at both 500 lux and 50 lux ambient illuminance after 30 minutes’ and a week’s wearing of the lens. A self-developed questionnaire was applied to evaluate the visual discomfort at the one-week visit. All quantitative data were analyzed by paired t-test, while qualitative data were analyzed by chi-square test or Wilcoxon signed-rank test. Results Central VA was not affected by DIMS lenses compared with SV lenses in all circumstances (all P>0.05). However, the mid-peripheral near VA was found to reduce by approximately 0.06 LogMAR unit in two out of four quadrants (500 lux; P Conclusion The mid-peripheral vision through DIMS lens was slightly affected compared with single vision lens. Otherwise, DIMS lens received good tolerance and acceptance by the Chinese children samples.