title: Visual functions of commercial drivers in relation to road accidents in Nigeria.
abstract: OBJECTIVE
  To determine the effects of the visual functions on the occurrence of road traffic accidents (RTA) amongst commercial drivers in Ife central local government area (LGA) of Osun state of Nigeria.
  
  
  METHODS
  A cross-sectional study.
  
  
  METHODS
  Four major motor parks located at Ife Central LGA.
  
  
  METHODS
  Of the estimated 270 commercial drivers in the four major parks of the LGA, 215 consecutive drivers were interviewed and had their eyes examined. Structured questionnaires were administered by an ophthalmologist.
  
  
  RESULTS
  The prevalence of visual impairment (visual acuity < 6/18) in the better eye without correction was 3.3% ± 2.4 and there was a significant association between uncorrected visual acuity impairment in the better eye and RTA (P = 0.0152). Refractive error was seen in 8.4% of the drivers, but none of these wear corrective glasses. Visual field defect, abnormal stereopsis and color vision impairment did not have any significant association with RTA.
  
  
  CONCLUSIONS
  Poor visual acuity is strongly associated with RTA amongst Nigerian commercial drivers as opposed to visual field defect, abnormal color vision and stereopsis. A significant proportion of visual impairment was due to uncorrected refractive errors.
authors.affiliation: Ophthalmology Unit, Department of Surgery, College of Health Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria.
authors.forename: M K
authors.initials: MK
authors.lastname: Oladehinde
authors.forename: A O
authors.initials: AO
authors.lastname: Adeoye
authors.forename: B O
authors.initials: BO
authors.lastname: Adegbehingbe
authors.forename: A O
authors.initials: AO
authors.lastname: Onakoya