title: Comparison Between Mix-and-Match Implantation of Bifocal Intraocular Lenses and Bilateral Implantation of Trifocal Intraocular Lenses.
abstract: OBJECTIVE
  To investigate the visual outcomes between mix-and-match bifocal intraocular lenses (IOLs) (ReSTOR +2.50 and +3.00 diopters [D]; Alcon Laboratories, Inc., Fort Worth, TX) versus bilateral implantation of a trifocal IOL (FineVision; PhysIOL, Liège, Belgium).
  
  
  METHODS
  Twenty-three patients (average age: 56.3 ± 6.9 years; range: 45 to 71 years) referred for lens phacoemulsification and IOL implantation were included in this study. Patients were randomly assigned to two groups. The FineVision group was bilaterally implanted with the FineVision trifocal IOL and the ReSTOR group was implanted with mix-and-match bifocal ReSTOR +2.50 and +3.00 D IOLs. A 3-month postoperative check was performed, and manifest refraction and logMAR uncorrected (UDVA) and corrected (CDVA) distance and near visual acuities were recorded. Monocular and binocular defocus curve testing was performed under photopic (85 cd/m2) conditions in 0.50-D defocus steps. Contrast sensitivity was measured monocularly and binocularly under mesopic conditions at spatial frequencies of 3, 6, 12, and 18 cycles per degree using the CSV-1000 contrast test (VectorVision, Greenville, OH).
  
  
  RESULTS
  There were no reported differences in monocular distance visual acuity or refractive outcomes between groups (P > .05). Furthermore, there were no significant differences in contrast sensitivity between the three IOLs (P > .05). The FineVision group achieved better monocular and binocular near and intermediate visual acuities under defocus curve testing than the ReSTOR group (P < .05).
  
  
  CONCLUSIONS
  Binocular implantation of the FineVision trifocal IOL provided a better range of visual acuities at near and intermediate distances than mix-and-match bifocal IOL implantation. [J Refract Surg. 2016;32(10):659-663.].
authors.forename: Rafael
authors.initials: R
authors.lastname: Bilbao-Calabuig
authors.forename: Felix
authors.initials: F
authors.lastname: González-López
authors.forename: Ferrer
authors.initials: F
authors.lastname: Amparo
authors.forename: Gemma
authors.initials: G
authors.lastname: Alvarez
authors.forename: Sunni R
authors.initials: SR
authors.lastname: Patel
authors.forename: Fernando
authors.initials: F
authors.lastname: Llovet-Osuna
mesh_terms: D000368:Aged; D015350:Contrast Sensitivity / Q000502:physiology; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011446:Prospective Studies; D011474:Prosthesis Design; D019591:Pseudophakia / Q000503:physiopathology; D015348:Vision, Binocular / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology