title: [The relationship of magnification change and visual acuity after implanting phakic anterior chamber intraocular lens for extreme high myopia].
abstract: OBJECTIVE
  To investigate the change of retinal image magnification and its relationship to post-operative best corrected visual acuity (BCVA) after implanting phakic anterior chamber intraocular lens for extreme high myopia.
  
  
  METHODS
  30 eyes in 23 patients with -15.13 to -29.00 Diopter (D) of myopia were implanted. The magnification change of retinal image was calculated with ZEMAX software. The relationship among myopic diopter, magnification change, BCVA, and post-operative BCVA improvement were analyzed.
  
  
  RESULTS
  The post-operative BCVA improved by 1 or more lines in 28 of 30 eyes (93%) at 3 months. 2 eyes (7%) no change of BCVA. There was positive correlations between myopic diopter and magnification change (r = 0.996, P < 0.01), and magnification change and post-operative BCVA improvement (r = 0.42, P = 0.02). There was negative correlations between myopic diopter and pro-operative BCVA (r = -0.62, P < 0.01), and post-operative BCVA (r = -0.57, P < 0.01).
  
  
  CONCLUSIONS
  Magnification change was one of reason for post-BCVA improvement. There is a positive correlation between Magnification change and post-BCVA improvement.
authors.affiliation: Department of Ophthalmology, Eye Ear Nose & Throat Hospital, Fudan University, Shanghai 200031, China.
authors.forename: Xiao-ying
authors.initials: XY
authors.lastname: Wang
authors.forename: Ren-yuan
authors.initials: RY
authors.lastname: Chu
authors.forename: Xing-tao
authors.initials: XT
authors.lastname: Zhou
authors.forename: Hong-xia
authors.initials: HX
authors.lastname: Zhang
authors.forename: Chuan-qing
authors.initials: CQ
authors.lastname: Zhou
authors.forename: Qiu-shi
authors.initials: QS
authors.lastname: Ren
mesh_terms: D000293:Adolescent; D000328:Adult; D000867:Anterior Chamber; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology* / Q000601:surgery*; D014792:Visual Acuity / Q000502:physiology*; D055815:Young Adult