title: Prevalence of corneal astigmatism in patients having routine cataract surgery at a teaching hospital in the United Kingdom.
abstract: OBJECTIVE
  To analyze and quantify the pattern of corneal astigmatism in patients awaiting cataract surgery and to establish the demand for toric intraocular lenses (IOLs) in a hospital unit.
  
  
  METHODS
  Singleton Hospital Abertawe Bro Morgannwg University NHS Trust, Swansea, United Kingdom.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  Keratometric measurements of all patients attending the preassessment clinic over a 4-month period were prospectively collected and analyzed.
  
  
  RESULTS
  The study comprised 1230 eyes of 746 patients with a mean age of 75.54 years ± 0.71 (SD). The corneal astigmatism was 0.50 diopter (D) or less in 301 eyes (24.47%), 1.50 D or less in 978 eyes (79.50%), more than 2.50 D in 57 eyes (4.61%), and 3.00 D or more in 24 eyes (1.93%).
  
  
  CONCLUSIONS
  Of patients attending for routine cataract surgery at a single center, 497 (40.41%) had more than 1.00 D of astigmatism. The results can help hospitals analyze the demand for and cost of using toric IOLs in patients with corneal astigmatism.
  
  
  BACKGROUND
  Neither author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: Singleton Hospital Abertawe Bro Morgannwg University NHS Trust, Swansea, United Kingdom.
authors.forename: Mohammad I
authors.initials: MI
authors.lastname: Khan
authors.forename: Mohammed
authors.initials: M
authors.lastname: Muhtaseb
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D001251:Astigmatism / Q000453:epidemiology*; D001699:Biometry; D002386:Cataract / Q000453:epidemiology*; D002387:Cataract Extraction; D003430:Cross-Sectional Studies; D005260:Female; D006784:Hospitals, Teaching / Q000706:statistics & numerical data*; D006801:Humans; D007910:Lenses, Intraocular / Q000191:economics / Q000600:supply & distribution; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology; D006113:United Kingdom / Q000453:epidemiology; D014792:Visual Acuity / Q000502:physiology