title: [Results of intraocular lens implantation on top of the anterior capsule in cases of phaco complications].
abstract: Posterior capsule rupture during cataract extraction requires that the intraocular lens (IOL) implanted on top of the capsular bag was stable and well-centered. The objective of this study was to evaluate the results of Rayner C-flex aspheric and M-flex aspheric (United Kingdom) IOLs implantation on top of the capsular bag and their stability in patients with phaco complications.
  
  
  METHODS
  A total of 2556 phacoemulsification cases were analyzed. Posterior capsule rupture as a complication occurred in 7 cases, that is 0.27%. In all patients Rayner C-flex (5) and M-flex (6) IOLs were implanted on top of the capsular bag according to the initial calculations and with no modifications in the procedure. The 2nd-year follow-up included measurement of the corneal compensated intraocular pressure (IOP) and B-mode and 3D grey-scale ultrasound in order to assess the structures of the anterior segment and to check the position of the IOL.
  
  
  RESULTS
  All surgeries yielded positive clinical results. In 2 years after the intervention uncorrected visual acuity averaged 0.7-0.13, corrected-- 0.91+0.07; clinical refraction: sphera-- +0.46 +/- 0.26 diopters, cylinder-- 0.71 +/- 0.29 diopters. The shape and other parameters of Rayner IOLs contribute to their long-term stability. Postoperative lOP in the treated eye was higher than in the fellow nonoperated eye (13.9 +/- 0.76 and 11.8 +/- 0.59 mmHg correspondingly) but the difference lied within the range of normal asymmetry.
  
  
  CONCLUSIONS
  The 3D ultrasound technology is an informative mean of monitoring the position of the IOL in case of its extracapsular implantation; a comparatively higher IOP in the operated eye does not exceed the range of normal asymmetry between the two eyes; Rayner C-flex and M-flex IOLs remain stable and well-centered after being implanted on top of the capsular bag.
authors.forename: V M
authors.initials: VM
authors.lastname: Sheludchenko
authors.forename: N V
authors.initials: NV
authors.lastname: Sheludchenko
authors.forename: O V
authors.initials: OV
authors.lastname: Éksarenko
authors.forename: R P
authors.initials: RP
authors.lastname: Poleva
mesh_terms: D000368:Aged; D000869:Anterior Eye Segment / Q000000981:diagnostic imaging*; D002386:Cataract / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D007429:Intraocular Pressure; D019654:Lens Implantation, Intraocular / Q000295:instrumentation / Q000379:methods; D008297:Male; D009031:Moscow; D018918:Phacoemulsification / Q000009:adverse effects / Q000379:methods / Q000534:rehabilitation; D011095:Polyethylenes / Q000627:therapeutic use; D057852:Posterior Capsule of the Lens / Q000293:injuries*; D011183:Postoperative Complications / Q000209:etiology / Q000601:surgery; D011474:Prosthesis Design; D015203:Reproducibility of Results; D012189:Retrospective Studies; D016896:Treatment Outcome; D014463:Ultrasonography; D014792:Visual Acuity
chemical_list: D011095:Polyethylenes