title: [The visual outcome and related factors in cataract patients with extreme myopia].
abstract: OBJECTIVE
  A prospective study was performed to analyze the visual outcome and factors related to the visual outcome in cataract patients with extreme myopia, in order to provide a principle for intraocular lens (IOL) diopter chosen.
  
  
  METHODS
  43 cases were included in the present series (myopia over 10.00 D, axial length over 27.00 mm, with clear cornea and slight or moderate opacity of the lens). Distance and near visual acuity (NVA), best corrected visual acuity and the fundus were examined before and after the phacoemulsification and implantation of IOL. chi(2) test and stepwise regression analysis were used to identify the predictive factors.
  
  
  RESULTS
  (1) Distance visual acuity, NVA and best corrected visual acuity were markedly improved in most cases. (2) NVA and fundus pathologic changes were two important factors for predicting post-operative visual acuity. (3) The prognosis was better in cases with NVA better than 20/200, and in cases with axial length below 29.00 mm. (4) Some cases with postoperative NVA worse than 20/80 complained of difficulty in reading.
  
  
  CONCLUSIONS
  NVA is an important factor influencing the outcome of vision and is an important parameter for predicting the outcome of vision in cataract patients with extreme myopia. IOL diopter should be determined carefully by preoperative NVA and the patients' demand for near work.
authors.affiliation: Affiliated Ophthalmology & Optometry Hospital of Wenzhou Medical College, Wenzhou 325003, China. zye@mail.eye.ac.cn
authors.forename: Yun-e
authors.initials: YE
authors.lastname: Zhao
authors.forename: Qin-mei
authors.initials: QM
authors.lastname: Wang
authors.forename: Jia
authors.initials: J
authors.lastname: Qu
authors.forename: Fan
authors.initials: F
authors.lastname: Lü
authors.forename: Shi-hao
authors.initials: SH
authors.lastname: Chen
authors.forename: Yu-hua
authors.initials: YH
authors.lastname: Tao
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002387:Cataract Extraction; D005260:Female; D006801:Humans; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology*; D011379:Prognosis; D011446:Prospective Studies; D012029:Refraction, Ocular; D014792:Visual Acuity