title: [Implantation of iris-claw phakic anterior chamber intraocular lenses for the correction of severe myopia].
abstract: OBJECTIVE
  To evaluate the efficiency, predictability, and complications after implantation of iris-clawed phakic intraocular lenses (PIOL) for the correction of severe myopia.
  
  
  METHODS
  In this study, 12 cases (21 eyes) with myopia at -11.5 to -21.0 diopters (D) were implanted with Verisyse iris-clawed PIOL with an optical zone of 6.0 or 5.5 mm. All cases have been followed-up for more than 6 months. Uncorrected visual acuity (UCVA), best spectacled-corrected visual acuity (BSCVA), refraction, intraocular pressure, corneal topography, contour of pupil, corneal endothelial count, PIOL IOL position and pigment deposits on the surface of IOL were observed.
  
  
  RESULTS
  The mean follow-up period was (13.2 +/- 2.14) months. After 12 months of follow-up, 17 eyes were investigated and no eyes experienced a loss in BSCVA. UCVA was significantly improved, Five eyes (29.41%) gained 1 line as compared to their preoperative BSCVA, 4 eyes (23.53%) gained 2 lines, 3 eyes (17.65%) gained 3 lines and 2 eyes (11.76%) gained 4 lines. BSCVA was significantly improved, 4 eyes (23.53%) gained 1 or more lines compared to their preoperative BSCVA, 2 eyes (11.76%) gained 2 lines, 2 eyes (11.76%) gained 3 lines, 2 eyes (11.76%) gained 4 lines and 5 eyes (29.41%) gained 5 or more lines. There was no statistically significant difference between pre- and 6 m or 12 m post-operative intraocular pressure and corneal endothelial density (P > 0.05).
  
  
  CONCLUSIONS
  Iris-clawed phakic intraocular lenses (PIOL) is an effective, safe and predictable procedure for the correction of severe myopia. Follow-up study is still required for the evaluation of long-term results.
authors.affiliation: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China. gzstwang@pub.guangzhou.gd.cn
authors.forename: Zheng
authors.initials: Z
authors.lastname: Wang
authors.forename: Bin
authors.initials: B
authors.lastname: Yang
authors.forename: Guo-fu
authors.initials: GF
authors.lastname: Huang
authors.forename: Xiao-yu
authors.initials: XY
authors.lastname: Cai
authors.forename: Xiao-xiao
authors.initials: XX
authors.lastname: Zhang
authors.forename: Sheng
authors.initials: S
authors.lastname: Zhou
authors.forename: Ping
authors.initials: P
authors.lastname: Qiu
authors.forename: Jia-qi
authors.initials: JQ
authors.lastname: Chen
mesh_terms: D000293:Adolescent; D000328:Adult; D000867:Anterior Chamber / Q000601:surgery; D005260:Female; D006801:Humans; D007498:Iris / Q000601:surgery; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007910:Lenses, Intraocular; D008297:Male; D009216:Myopia / Q000601:surgery*; D055815:Young Adult