title: Evaluation of optical performance of 4 aspheric toric intraocular lenses using an optical bench system: Influence of pupil size, decentration, and rotation.
abstract: OBJECTIVE
  To evaluate the effect of pupil size, degree of intraocular lens (IOL) decentration, and rotation of 4 aspheric toric IOLs on the image quality.
  
  
  METHODS
  Department of Ophthalmology, Seoul St. Mary's Hospital, Seoul, South Korea.
  
  
  METHODS
  Experimental study.
  
  
  METHODS
  Four aspheric toric intraocular lenses (IOLs)-the Precizon (transitional conic toric IOL), AT Torbi 709M (bitoric IOL), SN6AT4 (posterior toric surface IOL), and ZCT225 (anterior toric surface IOL)-were evaluated using the optical bench metrology system. Measurements included changes in spherical aberrations, relative spherical equivalent (SE), and image quality at different pupil diameters and image quality degradation due to decentration and rotation of the IOLs.
  
  
  RESULTS
  Change in relative SE with pupil size in aberration-free toric IOLs (transitional conic toric and bitoric IOLs) was greater than in negatively aspheric toric IOLs (posterior toric surface and anterior toric surface IOLs). In contrast, the aberration-free IOLs showed higher contrast than the negatively aspheric IOLs. When IOLs were decentered by 1.0 mm, the contrast reduction rates at 17.6 cycles per degree for the transitional conic toric IOL, bitoric IOL, posterior toric surface IOL, and anterior toric surface IOL were 5.1%, 3.1%, 12.2%, and 15.8%, respectively. Rotation-induced deterioration of contrast to 0.5 required a much higher rotation for the transitional conic toric IOL than for the other 3 IOLs.
  
  
  CONCLUSIONS
  The transitional conic toric IOL and bitoric IOL provided superior image quality despite pupil size changes and the presence of decentration. The transitional conic toric IOL demonstrated maximum rotation tolerance compared with the other IOLs.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Department of Ophthalmology and Catholic Institute for Visual Science (Kim, Yoo, Joo, Yoon) and the Department of Convergence Medicine Science (Yoo), College of Medicine, Catholic University of Korea, Seoul, South Korea; the Flaum Eye Institute (Yoon), Institute of Optics, Center for Visual Science, University of Rochester, Rochester, New York, USA.
authors.forename: Min-Ji
authors.initials: MJ
authors.lastname: Kim
authors.affiliation: From the Department of Ophthalmology and Catholic Institute for Visual Science (Kim, Yoo, Joo, Yoon) and the Department of Convergence Medicine Science (Yoo), College of Medicine, Catholic University of Korea, Seoul, South Korea; the Flaum Eye Institute (Yoon), Institute of Optics, Center for Visual Science, University of Rochester, Rochester, New York, USA.
authors.forename: Young-Sik
authors.initials: YS
authors.lastname: Yoo
authors.affiliation: From the Department of Ophthalmology and Catholic Institute for Visual Science (Kim, Yoo, Joo, Yoon) and the Department of Convergence Medicine Science (Yoo), College of Medicine, Catholic University of Korea, Seoul, South Korea; the Flaum Eye Institute (Yoon), Institute of Optics, Center for Visual Science, University of Rochester, Rochester, New York, USA. Electronic address: ckjoo@catholic.ac.kr.
authors.forename: Choun-Ki
authors.initials: CK
authors.lastname: Joo
authors.affiliation: From the Department of Ophthalmology and Catholic Institute for Visual Science (Kim, Yoo, Joo, Yoon) and the Department of Convergence Medicine Science (Yoo), College of Medicine, Catholic University of Korea, Seoul, South Korea; the Flaum Eye Institute (Yoon), Institute of Optics, Center for Visual Science, University of Rochester, Rochester, New York, USA.
authors.forename: Geunyoung
authors.initials: G
authors.lastname: Yoon
mesh_terms: D060437:Artificial Lens Implant Migration / Q000503:physiopathology*; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008962:Models, Theoretical; D055095:Optics and Photonics; D011680:Pupil / Q000502:physiology*; D012029:Refraction, Ocular / Q000502:physiology; D012399:Rotation; D014792:Visual Acuity / Q000502:physiology