title: Goldmann tonometer calibration: a national survey.
abstract: BACKGROUND
  Recent studies suggest that Goldmann tonometers can rapidly develop calibration errors (CEs) in clinical use and routine checks are necessary to ensure accuracy.
  
  
  OBJECTIVE
  To determine current practice regarding CE checks in the United Kingdom and assess the views of senior nursing staff in charge of running ophthalmology outpatient clinics as to whom they feel to be responsible for CE checks.
  
  
  METHODS
  Every ophthalmology unit with training recognition in England, Northern Ireland, Scotland, and Wales was contacted. Senior nurses responded to a structured telephone questionnaire regarding local tonometer calibration practice and their views regarding who is responsible for CE checks. A total of 155 eye units were identified and contacted. The response rate was 100%.
  
  
  RESULTS
  CEs were checked for daily in 8 units (5.2%), weekly in 20 units (12.9%), fortnightly in 1 unit (0.6%), monthly in 12 units (7.7%), trimonthly in 5 units (3.2%), biannually in 27 units (17.4%), and annually in 21 units (13.5%). CEs were either never checked or checked in a very random manner (no identifiable pattern) in 61 units (39.4%). Sixty-three (40.6%) of the respondents felt CE checks were a departmental responsibility, 48 (31.0%) felt it to be the doctor's responsibility, and 44 (28.4%) felt CE checks should be performed by the nursing staff.
  
  
  CONCLUSIONS
  Our national survey suggests that very few units check their tonometers for CEs at intervals which ensure their accuracy. Our previous survey of doctors suggests that they believe nurses should check for CE, whereas the nursing staff believe CE checks are not their responsibility. This lack of communication between health-care professionals may lead to inaccurate tonometers being used in clinical practice. We suggest that every eye unit should have a protocol, which clearly identifies individuals responsible for checking for CEs at least on a monthly basis.
authors.affiliation: Ophthalmology Department, Aintree University Hospitals NHS Foundation Trust, Walton Hospital, Liverpool, UK. nishant6377@gmail.com
authors.forename: N
authors.initials: N
authors.lastname: Kumar
authors.forename: R J
authors.initials: RJ
authors.lastname: Hillier
mesh_terms: D001291:Attitude of Health Personnel; D002138:Calibration / Q000592:standards; D019538:Health Care Surveys; D006801:Humans; D007429:Intraocular Pressure; D009741:Nursing Staff, Hospital; D010044:Outpatient Clinics, Hospital / Q000592:standards; D011364:Professional Practice / Q000706:statistics & numerical data; D014065:Tonometry, Ocular / Q000295:instrumentation* / Q000451:nursing / Q000592:standards*; D006113:United Kingdom