title: Visual function and car driving: longitudinal results 5 years after cataract surgery in a population.
abstract: OBJECTIVE
  To determine visual function in drivers who had cataract surgery 5 years previously, and to analyse longitudinal data, by comparing preoperative and postoperative changes in subjective driving ability and objective visual function.
  
  
  METHODS
  All patients (810) who underwent cataract surgery, during a 1 year period, were prospectively studied. Data regarding present driving status were collected from self administered questionnaires and visual acuity (VA) data were measured before and after surgery. All patients who were alive 5 years later were invited to participate with a new eye examination and questionnaire.
  
  
  RESULTS
  Before surgery 36 active drivers (16%) did not fulfil the visual requirements for driving; with improved glasses this number could be reduced to 24 (11%). 5 years after surgery, the corresponding figures were 5% and 3% (5/174), respectively. Before surgery 50% stated visual difficulties while driving in daylight and 79% in darkness. A few months and 5 years after surgery the corresponding figures were 6% and 5%, respectively, for daytime driving and 34% and 44%, respectively, for night-time driving.
  
  
  CONCLUSIONS
  Long term results regarding cataract surgery in car drivers are beneficial. 5 years after surgery only a few patients drove not fulfilling the requirements, but there were a larger proportion of patients with problems driving in darkness compared with a few months after surgery.
authors.affiliation: Department of Clinical Science/Ophthalmology, Umeå University, S-901 85 Umeå, Sweden. eva.monestam@vll.se
authors.forename: E
authors.initials: E
authors.lastname: Mönestam
authors.forename: B
authors.initials: B
authors.lastname: Lundquist
authors.forename: L
authors.initials: L
authors.lastname: Wachtmeister
mesh_terms: D000368:Aged; D001334:Automobile Driving / Q000331:legislation & jurisprudence / Q000592:standards*; D002387:Cataract Extraction / Q000534:rehabilitation*; D003624:Darkness; D005260:Female; D006801:Humans; D008004:Licensure; D008297:Male; D011184:Postoperative Period; D011379:Prognosis; D011446:Prospective Studies; D011795:Surveys and Questionnaires; D013548:Sweden; D014792:Visual Acuity