title: Microincision multifocal intraocular lens with and without a capsular tension ring: optical quality and clinical outcomes.
abstract: OBJECTIVE
  To study the effect of a capsular tension ring (CTR) on the visual, refractive, and intraocular optical quality of a multifocal intraocular lens (IOL) with diffractive asymmetrical light distribution.
  
  
  METHODS
  Vissum-Instituto de Oftalmológico de Alicante, Alicante, Spain.
  
  
  METHODS
  An Acri.Lisa 366D IOL was implanted without CTR implantation in 54 eyes (Group 1) or with Acri. Ring BR 11 CTR implantation in 40 eyes (Group 2). Intraocular optical quality in vivo was characterized by the difference between the postoperative total and corneal optical aberrations. Visual, refractive, and intraocular optical outcomes were evaluated 3 months postoperatively. Main outcome measures included postoperative residual refraction, uncorrected and corrected far and near visual acuities, intraocular aberrations, the Strehl ratio, and the modulation transfer function (MTF).
  
  
  RESULTS
  The postoperative means in Group 1 were spherical equivalent, 0.31 +/- 0.45 diopters (D); uncorrected distance acuity, 0.79 +/- 0.19; best corrected distance acuity, 0.95 +/- 0.11; uncorrected near acuity, 0.77 +/- 0.21; best corrected near acuity, 0.89 +/- 0.14; best distance-corrected acuity, 0.90 +/- 0.12. The Group 2 means were -0.18 +/- 0.60 D, 0.74 +/- 0.23, 0.98 +/- 0.07, 0.72 +/- 0.22, 0.86 +/- 0.14, and 0.86 +/- 0.14, respectively. Group 2 had a statistically significant reduction in intraocular aberrations and a significant increase in MTF values and Strehl ratios compared with Group 1.
  
  
  CONCLUSIONS
  Combined use of the CTR and Acri.Lisa 366D IOL provided good efficacy, predictability, and safety and increased the intraocular optical performance, suggesting better IOL stability.
authors: Vissum-Instituto de Oftalmológico de Alicante, Miguel Hernandez University, Alicante, Spain. jlalio@vissum.com
authors: Jorge L
authors: JL
authors: Alió
authors: Bassam
authors: B
authors: Elkady
authors: Dolores
authors: D
authors: Ortiz
authors: Gonzalo
authors: G
authors: Bernabeu
mesh_terms: D000328:Adult; D000368:Aged; D019781:Corneal Topography; D005260:Female; D006801:Humans; D007903:Lens Capsule, Crystalline / Q000601:surgery*; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007910:Lenses, Intraocular; D008297:Male; D008866:Microsurgery / Q000379:methods*; D008875:Middle Aged; D055095:Optics and Photonics; D018918:Phacoemulsification / Q000379:methods*; D011446:Prospective Studies; D019736:Prostheses and Implants; D012029:Refraction, Ocular / Q000502:physiology; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology