title: Changes in the accommodation-convergence relationship after the Artisan phakic intraocular lens implantation for myopic patients.
abstract: OBJECTIVE
  To evaluate the change of accommodation-convergence parameters after implantation of Artisan phakic intraocular lens (PIOL).
  
  
  METHODS
  Prospective study for the patients with the Artisan PIOL implantation was performed. A total of 37 patients (3 males and 34 females) enrolled the study. Preoperatively, convergence amplitude, the stimulus accommodative convergence per unit of accommodation (AC/A) ratio and the near point of convergence (NPC) were evaluated. After the Artisan PIOL implantation, the identical evaluations were repeated at 1 week, 1, 3, and 6 months after the surgery.
  
  
  RESULTS
  Mean age was 24.3 ± 4.8 years old, and preoperative refractive error was -8.92 ± 4.13 diopters (D). After the implantation, mean refractive errors significantly decreased to within ±1.00 D, and noticeable complications were not found. The convergence amplitude and the stimulus AC/A ratio increased 1 month after the surgery, but progressively stabilized afterward to near preoperative values. NPC didn't show any significant change over follow-up period up to 6 months.
  
  
  CONCLUSIONS
  These results regarding implantation of the Artisan PIOL revealed the increase of accommodation-convergence relationship within first 1 month after the surgery, but progressive stabilization was noted during follow-up periods.
authors.affiliation: Eye & U Eye Clinic, Seoul, Korea.
authors.forename: Ik Hee
authors.initials: IH
authors.lastname: Ryu
authors.affiliation: Institute of Vision Research, Department of Ophthalmology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Jinu
authors.initials: J
authors.lastname: Han
authors.affiliation: Institute of Vision Research, Department of Ophthalmology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Hyung Keun
authors.initials: HK
authors.lastname: Lee
authors.affiliation: B & VIIT Eye Center, Seoul, Korea.
authors.forename: Jin Kook
authors.initials: JK
authors.lastname: Kim
authors.affiliation: Institute of Vision Research, Department of Ophthalmology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Sueng-Han
authors.initials: SH
authors.lastname: Han
mesh_terms: D000065:Accommodation, Ocular; D000328:Adult; D003290:Convergence, Ocular; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods*; D008297:Male; D009216:Myopia / Q000175:diagnosis* / Q000601:surgery*; D054120:Phakic Intraocular Lenses; D011184:Postoperative Period; D011446:Prospective Studies; D054140:Refractive Surgical Procedures / Q000379:methods; D016896:Treatment Outcome; D014792:Visual Acuity; D055815:Young Adult
keywords: Convergence; Ocular accommodation; Phakic intraocular lenses