title: Biometric parameters and intra ocular lens power used for cataract eyes in Karnali, Nepal.
abstract: BACKGROUND
  The biometric parameters of the eye are measured for the calculation of the intra ocular lens power to be used in cataract surgery.
  
  
  OBJECTIVE
  To report the keratometry reading, axial length and intra ocular lens power used for eyes operated for cataract in Karnali Zone, Nepal, and to compare these findings with those reported in other similar studies.
  
  
  METHODS
  The data for the study were retrospectively collected from the case files of patients who had undergone cataract surgery between January 2011 and July 2012 in Karnali Zone, Nepal. These surgeries were performed in an outreach surgical camp organized by the Himalaya Eye Hospital, Nepal, as a part of its annual program. The SPSS 16.0 and Microsoft Excel 2007 software were used for the data analysis.
  
  
  RESULTS
  The total number of patients taken for the study was 1055 and the total number of eyes was 1055. There were 530 (50.23%) males and 525 (49.77%) females, with the mean age of 64.34±11.25, ranging from 8 to 98 years.The mean keratometry reading for the total sample was 44.11±1.6 (range, 34.00D to 49.00D). The mean axial length for the total sample was 22.68±0.88 (range, 17.75 to 26.17). The mean IOL power for the total sample was 21.60±1.74 (range, +15.00 to +30.00).
  
  
  CONCLUSIONS
  The biometric eye parameters of keratometry, axial length and IOL power of this study required for cataract surgery in a Karnali population are similar to those presented in other similar studies from Nepal and abroad.
authors: The Fred Hollows Foundation PNG, Madang, Papua New Guinea.
authors: Pawan
authors: P
authors: Baral
authors: Nabin
authors: N
authors: Baral
authors: Indra Man
authors: IM
authors: Maharjan
authors: Bhoj Raj
authors: BR
authors: Gautam
authors: Madhavendra
authors: M
authors: Bhandari
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001699:Biometry; D002386:Cataract / Q000453:epidemiology / Q000503:physiopathology / Q000534:rehabilitation*; D002387:Cataract Extraction; D002648:Child; D005260:Female; D006801:Humans; D007910:Lenses, Intraocular / Q000706:statistics & numerical data*; D008297:Male; D008875:Middle Aged; D009390:Nepal / Q000453:epidemiology; D015995:Prevalence; D011474:Prosthesis Design; D012029:Refraction, Ocular / Q000502:physiology*; D012189:Retrospective Studies; D014792:Visual Acuity; D055815:Young Adult