title: Optical quality comparison between 2 collagen copolymer posterior chamber phakic intraocular lens designs.
abstract: OBJECTIVE
  To compare the optical quality in vitro of 2 designs of the Visian Implantable Collamer Lens phakic intraocular lens (pIOL) for different powers and optical apertures.
  
  
  METHODS
  University of Valencia, Valencia, Spain.
  
  
  METHODS
  Experimental study.
  
  
  METHODS
  The Nimo TR1504 deflectometry device was used to measure the V4c pIOL, which has a smaller optic diameter, and the V5 pIOL, which has a larger optic diameter. The pIOLs were measured for -3.00 diopters (D), -6.00 D, -9.50 D, and -10.50 D at different optical apertures from 3.00 to 6.00 mm depending on the IOL power and model. The root mean square of higher-order aberrations (RMS HOAs) was analyzed. The Strehl ratio, point-spread functions (PSFs), and simulated images were calculated from wavefront aberrations.
  
  
  RESULTS
  There were no statistically significant differences in any Zernike RMS or RMS HOAs between the 2 pIOL models with the same power and optical aperture (P > .05). Both pIOLs had negative spherical aberration that increased with the pIOL power. Strehl ratio values showed no statistically significant differences between the pIOLs with the same power and pupil aperture. Minimal differences were seen in the PSFs and simulated images between the pIOLs.
  
  
  CONCLUSIONS
  Both pIOLs showed good and comparable in vitro optical quality similar that of a perfect lens in that they should not affect visual performance after implantation. Patients with larger pupil diameters could benefit from the pIOL with the larger optic diameter because it showed better in vitro optical quality than the previous design with a smaller optic diameter.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Optometry Research Group (GIO), Department of Optics, University of Valencia, Valencia, Spain.
authors.forename: Alberto
authors.initials: A
authors.lastname: Domínguez-Vicent
authors.affiliation: From the Optometry Research Group (GIO), Department of Optics, University of Valencia, Valencia, Spain.
authors.forename: Teresa
authors.initials: T
authors.lastname: Ferrer-Blasco
authors.affiliation: From the Optometry Research Group (GIO), Department of Optics, University of Valencia, Valencia, Spain.
authors.forename: Cari
authors.initials: C
authors.lastname: Pérez-Vives
authors.affiliation: From the Optometry Research Group (GIO), Department of Optics, University of Valencia, Valencia, Spain.
authors.forename: Jose J
authors.initials: JJ
authors.lastname: Esteve-Taboada
authors.affiliation: From the Optometry Research Group (GIO), Department of Optics, University of Valencia, Valencia, Spain. Electronic address: robert.montes@uv.es.
authors.forename: Robert
authors.initials: R
authors.lastname: Montés-Micó
mesh_terms: D003094:Collagen; D006801:Humans; D055095:Optics and Photonics / Q000592:standards*; D054120:Phakic Intraocular Lenses / Q000592:standards*; D011108:Polymers; D011474:Prosthesis Design; D011680:Pupil / Q000502:physiology; D012029:Refraction, Ocular / Q000502:physiology
chemical_list: D011108:Polymers; D003094:Collagen