title: Objective evaluation of through-focus optical performance of presbyopia-correcting intraocular lenses using an optical bench system.
abstract: OBJECTIVE
  TO evaluate spherical aberration and through-focus optical performances of 5 presbyopia-correcting and 2 monofocal intraocular lenses (IOLs).
  
  
  METHODS
  Flaum Eye Institute, University of Rochester, Rochester, New York, USA.
  
  
  METHODS
  Experimental study.
  
  
  METHODS
  Five presbyopia-correcting IOLs (Restor +4D SN6AD3, Restor +3D SN6AD1, Rezoom NXG1, Tecnis multifocal ZM900, Crystalens HD500) were tested using an optical bench system consisting of a model eye, a high-resolution Hartmann-Shack wavefront sensor, and an image-capturing device. Two monofocal IOLs (Sofport AO LI60AOV, Acrysof SN60AT) were measured for comparison. No accommodation was simulated. The spherical aberration profiles of each IOL were measured using the wavefront sensor. Through-focus performance was evaluated by calculating cross-correlation coefficients and comparing the likenesses of captured images of a resolution target and a perfect reference image.
  
  
  RESULTS
  With a 5.0 mm entrance pupil, the SN6AD3, SN6AD1, ZM900, NXG1, and HD500 IOLs had spherical aberration of -0.18 μm, -0.14 μm, -0.15 μm, -0.07 μm, and -0.01 μm, respectively. Distance image quality was poorer with multifocal and accommodating IOLs than with monofocal IOLs. All multifocal IOLs had effective distance and near image quality but had a loss in intermediate image quality. The HD 500 accommodating IOL had decreased distance image quality and slightly increased depth of focus compared with the monofocal IOLs because of the bispheric design.
  
  
  CONCLUSIONS
  The presbyopia-correcting IOLs had different optical characteristics, including spherical aberration profile and through-focus performance. An accurate understanding of the optical characteristics of individual IOLs is essential to selecting the best presbyopia-correcting IOL and thus improving cataract surgery outcomes.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: Flaum Eye Institute, University of Rochester, Rochester, New York, USA. yoon@cvs.rochester.edu
authors.forename: Myoung Joon
authors.initials: MJ
authors.lastname: Kim
authors.forename: Len
authors.initials: L
authors.lastname: Zheleznyak
authors.forename: Scott
authors.initials: S
authors.lastname: Macrae
authors.forename: Hungwon
authors.initials: H
authors.lastname: Tchah
authors.forename: Geunyoung
authors.initials: G
authors.lastname: Yoon
mesh_terms: D057108:Corneal Wavefront Aberration / Q000175:diagnosis; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008962:Models, Theoretical; D055095:Optics and Photonics; D011305:Presbyopia / Q000601:surgery*; D011474:Prosthesis Design; D011680:Pupil