title: Clinical evaluation of a multifocal aspheric diffractive intraocular lens.
abstract: OBJECTIVE
  To evaluate the performance of an aspheric diffractive multifocal acrylic intraocular lens (IOL), ZMB00 1-Piece Tecnis.
  
  
  METHODS
  Five sites across Europe.
  
  
  METHODS
  Fifty-two patients with cataracts (average age 68.5±10.5 years, 35 female) were bilaterally implanted with the aspheric diffractive multifocal IOL after completing a questionnaire regarding their optical visual symptoms, use of visual correction and their visual satisfaction. The questionnaire was completed again 4-6 months after surgery along with measures of uncorrected and best-corrected distance and near visual acuity, under photopic and mesopic lighting, reading ability, defocus curve testing and ocular examination for adverse events.
  
  
  RESULTS
  The residual refractive error was 0.01±0.47D with 56% of eyes within ±0.25D and 97% within ±1.0D. Uncorrected visual acuity was 0.02±0.10logMAR at distance and 0.15±0.30 logMAR at near, only reducing to 0.07±0.10logMAR at distance and 0.21±0.25logMAR at near in mesopic conditions.The defocus curve showed a near addition between 2.5-3.0 D allowing a reading acuity of 0.08±0.13 logMAR, with a range of clear vision <0.3 logMAR of ∼4.0 D. The average reading speed was 121.4±30.8 words per minute. Spectacle independence was 100% for distance and 88% for near, with high levels of satisfaction reported. Overall rating of vision without glasses could be explained (r=0.760) by preoperative best-corrected distance acuity, postoperative reading acuity and postoperative uncorrected distance acuity in photopic conditions (p<0.001). Only two minor adverse events occurred.
  
  
  CONCLUSIONS
  The ZMB00 1-Piece Tecnis multifocal IOL provides a good visual outcome at distance and near with minimal adverse effects.
authors.affiliation: Augen-Zentrum-Nordwest, , Ahaus, Germany.
authors.forename: Stefanie
authors.initials: S
authors.lastname: Schmickler
authors.forename: Carlos Palomino
authors.initials: CP
authors.lastname: Bautista
authors.forename: Frank
authors.initials: F
authors.lastname: Goes
authors.forename: Sunil
authors.initials: S
authors.lastname: Shah
authors.forename: James S
authors.initials: JS
authors.lastname: Wolffsohn
mesh_terms: D000368:Aged; D002386:Cataract; D002387:Cataract Extraction / Q000379:methods*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods*; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D011183:Postoperative Complications / Q000175:diagnosis; D011446:Prospective Studies; D012030:Refractive Errors / Q000175:diagnosis; D016896:Treatment Outcome; D014792:Visual Acuity
keywords: Lens and zonules; Optics and Refraction; Treatment Surgery