title: Presbyopic LASIK using hybrid bi-aspheric micro-monovision ablation profile for presbyopic corneal treatments.
abstract: OBJECTIVE
  To evaluate distance and near image quality after hybrid bi-aspheric multifocal central presbyLASIK treatments.
  
  
  METHODS
  Consecutive case series.
  
  
  METHODS
  Sixty-four eyes of 32 patients consecutively treated with central presbyLASIK were assessed. The mean age of the patients was 51 ± 3 years with a mean spherical equivalent refraction of -1.08 ± 2.62 diopters (D) and mean astigmatism of 0.52 ± 0.42 D. Monocular corrected distance visual acuity (CDVA), corrected near visual acuity (CNVA), and distance corrected near visual acuity (DCNVA) of nondominant eyes; binocular uncorrected distance visual acuity (UDVA); uncorrected intermediate visual acuity (UIVA); distance corrected intermediate visual acuity (DCIVA); and uncorrected near visual acuity (UNVA) were assessed pre- and postoperatively. Subjective quality of vision and near vision was assessed using the 10-item Rasch-scaled Quality of Vision and Near Activity Visual Questionnaire, respectively.
  
  
  RESULTS
  At 1 year postoperatively, 93% of patients achieved 20/20 or better binocular UDVA; 90% and 97% of patients had J2 or better UNVA and UIVA, respectively; 7% lost 2 Snellen lines of CDVA; Strehl ratio reduced by ∼-4% ± 14%. Defocus curves revealed a loss of half a Snellen line at best focus, with no change for intermediate vergence (-1.25 D) and a mean gain of 2 lines for near vergence (-3 D).
  
  
  CONCLUSIONS
  Presbyopic treatment using a hybrid bi-aspheric micro-monovision ablation profile is safe and efficacious. The postoperative outcomes indicate improvements in binocular vision at far, intermediate, and near distances with improved contrast sensitivity. A 19% retreatment rate should be considered to increase satisfaction levels, besides a 3% reversal rate.
authors.affiliation: Bergman Oogzorg, Naarden, Netherlands. Electronic address: M.Luger@bergmanclinics.nl.
authors.forename: Michiel H A
authors.initials: MH
authors.lastname: Luger
authors.affiliation: Flinders University, Adelaide, South Australia, Australia.
authors.forename: Colm
authors.initials: C
authors.lastname: McAlinden
authors.affiliation: School of Health Professions, Plymouth University, United Kingdom.
authors.forename: Philip J
authors.initials: PJ
authors.lastname: Buckhurst
authors.affiliation: School of Life and Health Sciences, Aston University, Birmingham, United Kingdom.
authors.forename: James S
authors.initials: JS
authors.lastname: Wolffsohn
authors.affiliation: SCHWIND eye-tech-solutions, Kleinostheim, Germany.
authors.forename: Shwetabh
authors.initials: S
authors.lastname: Verma
authors.affiliation: SCHWIND eye-tech-solutions, Kleinostheim, Germany.
authors.forename: Samuel
authors.initials: S
authors.lastname: Arba Mosquera
mesh_terms: D015350:Contrast Sensitivity / Q000502:physiology; D003319:Corneal Stroma / Q000601:surgery*; D019781:Corneal Topography; D005260:Female; D006801:Humans; D006956:Hyperopia / Q000503:physiopathology / Q000601:surgery; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D054018:Lasers, Excimer / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology / Q000601:surgery; D011305:Presbyopia / Q000503:physiopathology / Q000601:surgery*; D012189:Retrospective Studies; D011795:Surveys and Questionnaires; D015348:Vision, Binocular / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology