title: Optical and visual quality of the visian implantable collamer lens using an adaptive-optics visual simulator.
abstract: OBJECTIVE
  To evaluate visual and optical quality of the implantable collamer lens for different powers and sizes of incision surgery.
  
  
  METHODS
  Prospective study in humans.
  
  
  METHODS
  An adaptive optics visual simulator was used to measure 3 powers of implantable collamer lenses and simulate the implantable collamer lens wavefront aberration's pattern for small- and large-incision surgery. Visual acuity (VA) and contrast sensitivity were measured in 11 observers for 3- and 5-mm pupils. Modulation transfer function, point spread function, and Strehl ratio were calculated.
  
  
  RESULTS
  At 3 mm pupil, no statistically significant differences were found between both incision sizes for any implantable collamer lens power, except for -15 diopter (D) implantable collamer lens at 25 cycles/degree (cpd) (P < .05). At 5 mm pupil, statistically significant differences in Strehl ratio, VA, and contrast sensitivity were found between both incision sizes for all implantable collamer lens powers (P < .05). The outcomes were better with small incision. Implantable collamer lens power also affected the optical and visual quality. At 3 mm pupil, no statistically significant differences were found in VA and contrast sensitivity between implantable collamer lens powers, except between -3 and -15 D at low-contrast VA and at 20 and 25 cpd (P < .05). At 5 mm pupil, no statistically significant differences were found in Strehl ratio, VA, and contrast sensitivity between -3 and -6 D implantable collamer lens, but they did become apparent for -15 D implantable collamer lens for both incision sizes, all contrasts and spatial frequencies (P < .05).
  
  
  CONCLUSIONS
  The implantable collamer lens provides good optical and visual quality, although these outcomes decreased with large-incision surgery because of the increase of aberrations.
authors.affiliation: Optics Research Group, Optics Department, Faculty of Physics, University of Valencia, Valencia, Spain. cari.perez@uv.es
authors.forename: Cari
authors.initials: C
authors.lastname: Pérez-Vives
authors.forename: Teresa
authors.initials: T
authors.lastname: Ferrer-Blasco
authors.forename: Alberto
authors.initials: A
authors.lastname: Domínguez-Vicent
authors.forename: Santiago
authors.initials: S
authors.lastname: García-Lázaro
authors.forename: Robert
authors.initials: R
authors.lastname: Montés-Micó
mesh_terms: D057128:Aberrometry / Q000295:instrumentation; D000293:Adolescent; D000328:Adult; D006801:Humans; D019654:Lens Implantation, Intraocular; D008866:Microsurgery / Q000379:methods*; D055095:Optics and Photonics; D054120:Phakic Intraocular Lenses; D011446:Prospective Studies; D054140:Refractive Surgical Procedures / Q000379:methods*; D014785:Vision, Ocular / Q000502:physiology*; D014792:Visual Acuity / Q000502:physiology*; D055815:Young Adult