title: Vision performance with a contact lens designed to slow myopia progression.
abstract: OBJECTIVE
  Recent research suggests multizone/dual-focus (DF) lens corrections may aid in controlling the progression of myopia. Recently, such a soft contact lens has become commercially available in Hong Kong (MiSight, CooperVision). The purpose of the current study was to evaluate the visual acceptability of this new lens design.
  
  
  METHODS
  In a double-masked, randomized, crossover trial, 24 subjects (aged 18 to 25 years) wore MiSight contact lenses and Proclear Multifocal +2.00 diopters Add D (MF) soft contact lenses. Patient-reported outcomes (0 to 100 scale) and objective measures of visual performance were acquired for best-spectacle distance correction (BC) and with each contact lens after 1 week of daily use at HIHC (high illumination-high contrast) at distance and LILC (low illumination-low contrast) at distance, intermediate, and near.
  
  
  RESULTS
  There were no significant differences in HIHC distance acuity between BC and either the DF or MF lens and no difference between the DF and MF lenses. However, when measured under LILC, there were significant mean differences between each study lens and BC viewed at distance and intermediate. The LILC logMAR visual acuity was not significantly different between the DF and MF lenses at any viewing distance. Although average visual quality and ghosting ratings for both DF and MF study lenses were significantly lower than habitual under all conditions, there were no significant differences between the DF and MF lenses (p = 0.448).
  
  
  CONCLUSIONS
  Good acuity, similar to that attainable with typical MF lens correction, is attainable with a new contact lens designed to control myopia progression. However, like other contact lenses that contain multiple refractive zones, some decrease in visual performance may be experienced.
authors: Indiana University School of Optometry, Bloomington, Indiana, USA. kollbaum@indiana.edu
authors: Pete S
authors: PS
authors: Kollbaum
authors: Meredith E
authors: ME
authors: Jansen
authors: Jacqueline
authors: J
authors: Tan
authors: Dawn M
authors: DM
authors: Meyer
authors: Martin E
authors: ME
authors: Rickert
mesh_terms: D000328:Adult; D003263:Contact Lenses, Hydrophilic; D018592:Cross-Over Studies; D018450:Disease Progression; D004311:Double-Blind Method; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009216:Myopia / Q000503:physiopathology* / Q000534:rehabilitation; D012029:Refraction, Ocular; D014792:Visual Acuity; D055815:Young Adult