title: Effect of hemodialysis on intraocular lens power calculation.
abstract: BACKGROUND
  To evaluate changes in ocular biometric parameters after hemodialysis (HD) in patients with end-stage renal disease (ESRD).
  
  
  METHODS
  Forty eyes of 40 patients undergoing HD were included in this cross-sectional study. Keratometry (K) readings, white-to-white (WTW) distance, central corneal thickness (CCT), anterior chamber depth (ACD), pupil diameter, lens thickness (LT), axial length (AL), and intraocular lens (IOL) power calculation were measured with Lenstar LS 900 (Haag Streit AG, Koeniz, Switzerland) before and after hemodialysis. Intraocular pressure (IOP) was measured with a non-contact tonometer (Tonopachy NT-530P, Nidek Co., LTD, Tokyo, Japan). Main outcomes were changes in biometric parameters after HD. Reliability of the measurements (intraclass correlation coefficients (ICCs)) and the effect size (Cohen's d) were also calculated.
  
  
  RESULTS
  Mean difference in AL before and after HD was -0.041 ± 0.022 mm with ICCs > 0.90 (p < 0.001 and Cohen's d = 0.06). Pupil diameter was also significantly different before (4.28 ± 0.81 mm) and after (4.44 ± 0.79 mm) HD with ICCs > 0.90 (p = 0.041 and Cohen's d = 0.20). Hemodialysis had no significant effect on K readings, WTW distance, CCT, ACD, LT, or IOP.
  
  
  CONCLUSIONS
  Axial length and pupil diameter increase after HD with small effect size, while HD does not significantly affect IOL power calculations.
authors.affiliation: a Ophthalmology Department , Dışkapi Yildirim Beyazit Training and Research Hospital , Ankara , Turkey ;
authors.forename: Sinan
authors.initials: S
authors.lastname: Çalışkan
authors.affiliation: a Ophthalmology Department , Dışkapi Yildirim Beyazit Training and Research Hospital , Ankara , Turkey ;
authors.forename: Osman
authors.initials: O
authors.lastname: Çelikay
authors.affiliation: a Ophthalmology Department , Dışkapi Yildirim Beyazit Training and Research Hospital , Ankara , Turkey ;
authors.forename: Tolga
authors.initials: T
authors.lastname: Biçer
authors.affiliation: b Nephrology Department , Dışkapi Yildirim Beyazit Training and Research Hospital , Ankara , Turkey.
authors.forename: Mehmet Deniz
authors.initials: MD
authors.lastname: Aylı
authors.affiliation: a Ophthalmology Department , Dışkapi Yildirim Beyazit Training and Research Hospital , Ankara , Turkey ;
authors.forename: Canan
authors.initials: C
authors.lastname: Gürdal
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001699:Biometry; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007908:Lens, Crystalline / Q000033:anatomy & histology* / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D006435:Renal Dialysis
keywords: Cataract surgery; chronic kidney disease; hemodialysis; intraocular lens power; ocular biometric parameters