title: A national survey of diagnostic tests reported by UK community optometrists for the detection of chronic open angle glaucoma.
abstract: OBJECTIVE
  In the UK, the majority of cases of chronic open angle glaucoma are detected by community optometrists following a routine sight test. However, there is potential for variability in case finding strategies used. The aim of this study was to carry out a national web-based survey to determine current diagnostic tests used by optometrists in glaucoma case finding.
  
  
  METHODS
  Optometrists on the Association of Optometrists (AOP) electronic database were invited to participate. The survey was open for 16 weeks between April and July 2008.
  
  
  RESULTS
  A total of 1875 optometrists were eligible to enter the survey, of which 1264 answered the questions relating to diagnostic equipment. Respondents were asked to indicate their usual method of examining the optic nerve head. Direct ophthalmoscopy only was used by 25% with the majority (62%) using a combination of direct and slit-lamp binocular indirect methods. The vast majority of optometrists (78%) used non-contact tonometry to measure intraocular pressure, with only 16% routinely using a Goldmann or Perkins applanation tonometer. The perimeter most frequently used was either one of the Henson range of instruments (39%) or the Humphrey Field Analyser (22%). A smaller number of optometrists (<5%) had access to more specialised imaging equipment, such as HRT, GDx or OCT.
  
  
  CONCLUSIONS
  The results of the survey demonstrate that UK optometrists are well equipped to carry out case finding for chronic open angle glaucoma, although there is a lack of standardisation with respect to equipment used.
authors.affiliation: Henry Wellcome Laboratories for Vision Sciences, Department of Optometry and Visual Science, City University London, London, UK. joy.myint.1@city.ac.uk
authors.forename: Joy
authors.initials: J
authors.lastname: Myint
authors.forename: David F
authors.initials: DF
authors.lastname: Edgar
authors.forename: Aachal
authors.initials: A
authors.lastname: Kotecha
authors.forename: Ian E
authors.initials: IE
authors.lastname: Murdoch
authors.forename: John G
authors.initials: JG
authors.lastname: Lawrenson
mesh_terms: D003695:Delivery of Health Care / Q000592:standards* / Q000706:statistics & numerical data; D005260:Female; D005902:Glaucoma, Open-Angle / Q000175:diagnosis* / Q000453:epidemiology; D019538:Health Care Surveys; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D008297:Male; D009907:Optometry / Q000592:standards*; D012017:Referral and Consultation / Q000592:standards* / Q000706:statistics & numerical data; D006113:United Kingdom / Q000453:epidemiology; D014794:Visual Fields / Q000502:physiology*