title: [Results of residual ametropia correction using CIRCLE technology after femtosecond laser SMILE surgery].
abstract: OBJECTIVE
  to evaluate functional results of reoperation performed according to the CIRCLE technology and using the VisuMax femtosecond laser and MEL-80 excimer laser in cases of regression of the refractive effect after SMILE surgery.
  
  
  METHODS
  We studied a group of post-SMILE patients. In those, who showed regression of the refractive effect at 1 year, reoperation was performed according to the CIRCLE technology and using the VisuMax femtosecond laser. The corneal flap was separated from the stromal bed and turned aside. Excimer laser ablation of the stromal bed was performed with the MEL 80 machine. The corneal flap was then placed back and rinsed from both sides. Uncorrected (UCVA) and corrected (BCVA) visual acuity as well as spherical equivalent (SE) were estimated before reoperation, on day 1, and at 1 month.
  
  
  RESULTS
  After reoperation, BCVA and UCVA improved. Patient refraction became close to emmetropia. Specifically, UCVA was 0.23±0.18 at baseline (i.e. 1 year after SMILE) and 0.93±0.11 after the CIRCLE procedure (p<0.05). The absolute value of SE was 1.86±1.15 D and 0±0 D before and after CIRCLE, respectively (p<0.05). BCVA change was not statistically significant - from 0.95±0.1 to 0.93±0.11 (p>0.05).
  
  
  CONCLUSIONS
  Reoperation performed according to the CIRCLE technology and using the VisuMax femtosecond laser and MEL-80 excimer laser provides an increase in visual acuity in case of post-SMILE regression of the refractive effect.
authors.affiliation: Ekaterinburg branch of the Academician S.N. Fyodorov IRTC 'Eye Microsurgery', 4A Akademika Bardina, Ekaterinburg, Sverdlovskaya Oblast, 620149.
authors.forename: O A
authors.initials: OA
authors.lastname: Kostin
authors.affiliation: Ekaterinburg branch of the Academician S.N. Fyodorov IRTC 'Eye Microsurgery', 4A Akademika Bardina, Ekaterinburg, Sverdlovskaya Oblast, 620149.
authors.forename: S V
authors.initials: SV
authors.lastname: Rebrikov
authors.affiliation: Ekaterinburg branch of the Academician S.N. Fyodorov IRTC 'Eye Microsurgery', 4A Akademika Bardina, Ekaterinburg, Sverdlovskaya Oblast, 620149.
authors.forename: A I
authors.initials: AI
authors.lastname: Ovchinnikov
authors.affiliation: Ekaterinburg branch of the Academician S.N. Fyodorov IRTC 'Eye Microsurgery', 4A Akademika Bardina, Ekaterinburg, Sverdlovskaya Oblast, 620149.
authors.forename: A A
authors.initials: AA
authors.lastname: Stepanov
authors.affiliation: Pirogov Russian National Research Medical University, 1 Ostrovityanova St., Moscow, Russian Federation, 117997.
authors.forename: Kh P
authors.initials: KP
authors.lastname: Takhchidi
mesh_terms: D000328:Adult; D003315:Cornea / Q000473:pathology; D016039:Corneal Transplantation / Q000295:instrumentation / Q000379:methods; D005260:Female; D006801:Humans; D053685:Laser Therapy / Q000295:instrumentation / Q000379:methods; D054018:Lasers, Excimer / Q000627:therapeutic use*; D008297:Male; D011183:Postoperative Complications / Q000175:diagnosis / Q000209:etiology / Q000601:surgery; D012030:Refractive Errors / Q000175:diagnosis / Q000503:physiopathology; D054140:Refractive Surgical Procedures / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods; D012086:Reoperation / Q000379:methods / Q000706:statistics & numerical data; D013524:Surgical Flaps; D016896:Treatment Outcome; D014792:Visual Acuity