title: Evaluation of optical quality parameters and ocular aberrations in multifocal intraocular lens implanted eyes.
abstract: OBJECTIVE
  We investigated the correlations between optical quality parameters obtained from the double-pass system and ocular aberrations obtained from the ray-tracing aberrometer in multifocal intraocular lens (IOL) implanted eyes.
  
  
  METHODS
  Twenty eyes from 20 patients were enrolled in this study. Modulation transfer function cutoff frequency, The Strehl ratio, objective scatter index, and objective pseudo-accommodation obtained from the double-pass system were compared with root mean square (RMS) total aberration, RMS higher-order aberration, and spherical aberration obtained from the ray-tracing aberrometer. Additionally, parameters of the double-pass system and ray-tracing aberrometer were compared with manifested refraction values and subjective visual acuity, respectively.
  
  
  RESULTS
  There was no statistically significant correlation between optical quality parameters obtained from the double-pass system and ocular aberrations, except between the Strehl ratio and RMS total aberration (r=-0.566, p=0.018). No significant correlations were found between the parameters of both devices, and manifested refraction values or subjective visual acuity.
  
  
  CONCLUSIONS
  Optical quality parameters, especially the Strehl ratio, in multifocal IOL implanted eyes were affected by RMS total aberration. Further studies based on accurate measurements of ocular aberrations and additional optical quality parameters are needed to delineate relationships between optical quality parameters and ocular aberrations in multifocal IOL implanted eyes.
authors.affiliation: Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Hun
authors.initials: H
authors.lastname: Lee
authors.affiliation: Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Kwanghyun
authors.initials: K
authors.lastname: Lee
authors.affiliation: Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Ji Min
authors.initials: JM
authors.lastname: Ahn
authors.affiliation: Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea. ; Department of Ophthalmology, Corneal Dystrophy Research Institute, Severance Biomedical Science Institute, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Eung Kweon
authors.initials: EK
authors.lastname: Kim
authors.affiliation: Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Bradford
authors.initials: B
authors.lastname: Sgrignoli
authors.affiliation: Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea. tikim@yuhs.ac.
authors.forename: Tae-im
authors.initials: TI
authors.lastname: Kim
mesh_terms: D000328:Adult; D000368:Aged; D002387:Cataract Extraction; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D012029:Refraction, Ocular; D014792:Visual Acuity
keywords: Double-pass system; cataract surgery; multifocal intraocular lens; optical quality; ray-tracing aberrometer