title: Retrospective evaluation of the influence of pupil size on visual acuity after KAMRA inlay implantation.
abstract: OBJECTIVE
  To investigate the influence of pupil size on visual acuity after KAMRA inlay (AcuFocus, Inc., Irvine, CA) implantation.
  
  
  METHODS
  Five hundred eighty-four presbyopic eyes of 584 patients who underwent LASIK were evaluated. Uncorrected near visual acuity (UNVA), uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), and corrected near visual acuity (CNVA) were measured. Two groups were classified: small pupil (pupil diameter < 6 mm) and large pupil (pupil diameter ≥ 6 mm) for both mesopic (pupil diameter < 4 mm) and photopic (pupil diameter ≥ 4 mm) pupil size parameters. The follow-up period was 6 months.
  
  
  RESULTS
  There were no significant differences in UNVA (P = .98) and CNVA (P = .16) between the mesopic pupil size groups; however, there were significant differences in UDVA (P = .023) and CDVA (P = .039). There was a weak correlation between pupil size and UDVA of the large mesopic pupil size group (rs = 0.129, P = .04). There were no significant differences in UNVA (P = .78), CNVA (P = .92), UDVA (P = .19), and CDVA (P = .60) for the photopic pupil size groups.
  
  
  CONCLUSIONS
  Pupil size does not have an influence on the resultant visual acuity after KAMRA inlay implantation. No correlation was found between preoperative and postoperative pupil size and visual acuity for the mesopic pupil groups.
authors.forename: Minoru
authors.initials: M
authors.lastname: Tomita
authors.forename: Tomomi
authors.initials: T
authors.lastname: Kanamori
authors.forename: George O
authors.initials: GO
authors.lastname: Waring
authors.forename: Tukezban
authors.initials: T
authors.lastname: Huseynova
mesh_terms: D000328:Adult; D003319:Corneal Stroma / Q000601:surgery; D048988:Corneal Surgery, Laser; D005260:Female; D006801:Humans; D008297:Male; D055255:Mesopic Vision / Q000502:physiology; D008875:Middle Aged; D011145:Polyvinyls; D011305:Presbyopia / Q000503:physiopathology / Q000601:surgery*; D019736:Prostheses and Implants; D019919:Prosthesis Implantation; D011680:Pupil / Q000502:physiology*; D012189:Retrospective Studies; D013524:Surgical Flaps; D014792:Visual Acuity / Q000502:physiology*; D005465:Fluorocarbon Polymers
chemical_list: D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers