title: Objective accommodation measurement of the Crystalens HD compared to monofocal intraocular lenses.
abstract: OBJECTIVE
  Objective evaluation of accommodation with a bilateral accommodating intraocular lens (IOL) versus monofocal IOLs.
  
  
  METHODS
  Patients received accommodating IOL (Crystalens HD; Bausch & Lomb, Rochester, NY) bilaterally after cataract surgery. These were compared to a matched group receiving monofocal IOLs. Preoperative and postoperative distance corrected distance, intermediate, and near vision were evaluated. Objective accommodation was measured with the WAM-5500 Binocular Autorefractor/Keratometer (Grand Seiko, Pty Ltd., Hiroshima, Japan).
  
  
  RESULTS
  Nineteen patients were included. Ten received the Crystalens HD in both eyes and nine received one of three monofocal lenses in each eye. Mean postoperative distance corrected distance visual acuity was not statistically different between the two groups. Mean distance corrected intermediate vision was better in the Crystalens HD group (logMAR 0.24 ± 0.11 [control], logMAR 0.11 ± 0.10 [Crystalens HD], P = .033). The groups did not differ significantly for mean distance corrected near vision (logMAR 0.54 ± 0.12 [control], logMAR 0.42 ± 0.15 [Crystalens HD], P = .087). However, a significantly greater proportion of Crystalens HD eyes achieved 0.4 or 0.3 logMAR for near wearing their distance correction (P = .013). With distance correction, the mean spherical equivalent failed to show any myopia with accommodative effort in either group. Low contrast and low luminance contrast acuity were not significantly different.
  
  
  CONCLUSIONS
  The Crystalens HD showed some benefit for intermediate visual function compared to the monofocal IOLs with both groups wearing full correction for distance. There were no significant signs of accommodation in either group.
authors: Department of Ophthalmology, The Queen Elizabeth Hospital, South Australia Instiutte of Ophthalmology, University of Adelaide, Australia.
authors: Katherine V
authors: KV
authors: Zamora-Alejo
authors: Sacha Pierre
authors: SP
authors: Moore
authors: Douglas G A
authors: DG
authors: Parker
authors: Katja
authors: K
authors: Ullrich
authors: Adrian
authors: A
authors: Esterman
authors: Michael
authors: M
authors: Goggin
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011474:Prosthesis Design; D019591:Pseudophakia / Q000503:physiopathology*; D012029:Refraction, Ocular / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology