title: [Refractive predictability and stability of three-piece versus single-piece intraocular lenses in patients with high axial myopia].
abstract: BACKGROUND
  Based on previous data on single-piece and three-piece intraocular lenses (IOLs) there is no evidence for significant differences in decentration, tilt and refractive shift. The purpose of the current study was to compare single-piece and three-piece IOLs in patients with high axial myopia.
  
  
  METHODS
  A total of 68 eyes of 50 patients with high axial myopia (axis length ≥ 28.00 mm) with and without cataract who underwent complication-free phacoemulsification and IOL implantation were retrospectively examined. To compare single-piece and three-piece IOLs, the patients were retrospectively grouped depending on IOL type: group 1 acrylic single-piece IOL (n = 37; ACR6D SE, Corneal, France) and group 2 acrylic three-piece IOL with fixed haptic frame (n = 31; AF-1 UY, Hoya, Japan). Patient files were analyzed regarding best spectacle-corrected visual acuity (BSCVA), refractive predictability and stability.
  
  
  RESULTS
  In this study the mean BSCVA was determined as 0.22 ± 0.12 logMAR and 0.13 ± 0.11 logMAR 6 months postoperatively for the ACR6D SE group and the AF-1 UV group, respectively (p = 0.09). Refractive predictability was less accurate in the ACR6D SE (+ 1.75 ± 2.2 dpt) compared to the AF-1 UV (- 0.37 ± 1.1) treated eyes (p = 0.001). Refractive stability, defined as the difference in diopters between the first week and the sixth month after surgery, resulted in  + 0.40 ± 1.7 dpt and -0.16 ± 1.2 dpt for the ACR6D SE and the AF-1 UV, respectively (p = 0.022).
  
  
  CONCLUSIONS
  The three-piece AF-1 UV showed satisfactory refractive predictability and stability in patients with high axial myopia. The ACR6D SE has a high refractive unpredictability and should not be used in eyes with high axial myopia.
authors.affiliation: Universitäts-Augenklinik Graz, Medizinische Universität Graz, Auenbruggerplatz 4, 8036, Graz, Österreich.
authors.forename: A
authors.initials: A
authors.lastname: Frings
authors.forename: I
authors.initials: I
authors.lastname: Steinbrugger
authors.forename: E
authors.initials: E
authors.lastname: Wissiak
authors.forename: B
authors.initials: B
authors.lastname: Vidic
authors.forename: Y
authors.initials: Y
authors.lastname: El-Shabrawi
authors.forename: N
authors.initials: N
authors.lastname: Ardjomand
mesh_terms: D000328:Adult; D000368:Aged; D019544:Equipment Failure Analysis; D006801:Humans; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000150:complications / Q000175:diagnosis* / Q000534:rehabilitation*; D011474:Prosthesis Design; D012030:Refractive Errors / Q000175:diagnosis* / Q000534:rehabilitation*; D016896:Treatment Outcome; D014792:Visual Acuity