title: Refractive error with optimum intraocular lens power calculation after glaucoma filtering surgery.
abstract: OBJECTIVE
  To assess the possibility of deriving an optimum intraocular lens (IOL) power after previous successful trabeculectomy.
  
  
  METHODS
  Chang Gung Memorial Hospital, Linko, Taiwan.
  
  
  METHODS
  The retrospective study included 1 eye of 22 patients who had cataract surgery after successful trabeculectomy performed by 1 surgeon. Twenty-two eyes that had cataract surgery only performed by the same surgeon were paired as a control group. The IOL power was calculated by the Sanders-Retzlaff-Kraff regression analysis formula based on the data derived after trabeculectomy. The postoperative refractive error at least 1 month after cataract surgery was recorded, and the difference was analyzed by a paired t test and 2-sample t test.
  
  
  RESULTS
  Cataract surgery combined with trabeculectomy resulted in a mean spherical equivalent of -0.33 diopter +/- 1.58 (SD). This was not significantly different from the predicted refractive error or the result in the control group (P>.05).
  
  
  CONCLUSIONS
  Although the fluctuation in pseudophakic axial length measurement after glaucoma filtering surgery was logical, a predictable pseudophakic refractive outcome was derived clinically once the intraocular pressure stabilized after trabeculectomy.
authors.affiliation: Department of Ophthalmology, Chang Gung Memorial Hospital, Linko, Taiwan.
authors.forename: Hsin-Yuan
authors.initials: HY
authors.lastname: Tan
authors.forename: Shiu-Chen
authors.initials: SC
authors.lastname: Wu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005901:Glaucoma / Q000601:surgery*; D006801:Humans; D007429:Intraocular Pressure; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D008962:Models, Theoretical; D018918:Phacoemulsification / Q000009:adverse effects*; D012030:Refractive Errors / Q000209:etiology*; D012189:Retrospective Studies; D014130:Trabeculectomy / Q000009:adverse effects*