title: Long-time results and associations between subjective visual difficulties with car driving and objective visual function 5 years after cataract surgery.
abstract: OBJECTIVE
  To determine results and associations between subjective visual difficulties while driving and objective visual function in drivers who had cataract surgery 5 years previously.
  
  
  METHODS
  Norrlands University Hospital, Umeå, Sweden.
  
  
  METHODS
  This prospective outcomes study examined 189 active drivers who had cataract surgery 5 years earlier. Visual acuity and low-contrast visual acuity (LCVA) were measured, and a questionnaire with driving-specific questions (VF-14 based) was completed. The results were compared with data before and after surgery.
  
  
  RESULTS
  Five years after cataract surgery, only a small proportion of patients (3%) drove without fulfilling the visual requirements. Few patients (5%) reported visual difficulties while driving in daylight, but a large proportion (43%) experienced difficulties in darkness, with glare being the most common problem. There was a statistically significant association between an LCVA of less than 20/50 and reporting subjective visual difficulties while driving (odds ratio [OR], 2.6; 95% confidence interval [CI], 1.1 to 6.8). Women had 1.8 times the odds of reporting visual difficulties compared with men (95% CI, 1.0 to 3.5).
  
  
  CONCLUSIONS
  Most active drivers had excellent visual acuity and no difficulty with daytime driving and distance estimation 5 years after cataract surgery. A large proportion of patients experienced difficulties while driving at night. These data suggest an adjusted association between LCVA and self-assessed visual difficulties while driving 5 years after cataract surgery. Our data confirm the importance of LCVA in relation to driving, especially in darkness.
authors.affiliation: Department of Clinical Sciences/Ophthalmology, Umeå University, Sweden. eva.monestam@vil.se
authors.forename: Eva
authors.initials: E
authors.lastname: Mönestam
authors.forename: Britta
authors.initials: B
authors.lastname: Lundqvist
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001334:Automobile Driving; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D010043:Outcome and Process Assessment, Health Care; D018918:Phacoemulsification; D011446:Prospective Studies; D011795:Surveys and Questionnaires; D014786:Vision Disorders / Q000503:physiopathology*; D014792:Visual Acuity / Q000502:physiology*