title: Lack of effect of intraocular lens asphericity on visual performance with acrylic intraocular lenses.
abstract: OBJECTIVE
  To determine whether implantation of acrylic intraocular lens (IOL) with aspheric design (Tecnis Z9003, AMO) results in improved visual acuity or contrast sensitivity compared with conventional spherical acrylic IOL (AR40e, AMO).
  
  
  METHODS
  In an intraindividual randomized prospective study of 60 patients with bilateral cataract, the Tecnis Z9003 IOL was compared with the AR40e IOL. Ocular aberrations for a 4.0-mm pupil and 6.0-mm pupil were measured with a Hartmann-Shack aberrometer. Quality of vision was measured using visual acuity and contrast sensitivity under mesopic and photopic conditions.
  
  
  RESULTS
  Eyes with the Tecnis Z9003 IOL had significantly less spherical aberration and greater Strehl ratio after surgery, showing a better optical quality in comparison with the standard spherical IOL. However, visual acuity and both mesopic and photopic contrast sensitivity were not significantly different between the groups.
  
  
  CONCLUSIONS
  The significantly better optical quality achieved with the aspheric acrylic IOL design did not result in improved visual acuity or contrast sensitivity in comparison with a conventional spherical acrylic IOL.
authors.affiliation: Refractive Surgery Department, Centro Oftalmológico Marqués de Sotelo and Hospital NISA Valencia al Mar, Valencia, Spain. gon.munoz@ono.com
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Muñoz
authors.forename: César
authors.initials: C
authors.lastname: Albarrán-Diego
authors.forename: M Ángeles
authors.initials: MÁ
authors.lastname: Galotto
authors.forename: Javier
authors.initials: J
authors.lastname: Pascual
authors.forename: Teresa
authors.initials: T
authors.lastname: Ferrer-Blasco
mesh_terms: D000180:Acrylic Resins; D000368:Aged; D000369:Aged, 80 and over; D015350:Contrast Sensitivity / Q000502:physiology*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D055095:Optics and Photonics; D011474:Prosthesis Design; D014792:Visual Acuity / Q000502:physiology*
chemical_list: D000180:Acrylic Resins