The increasing number of vehicles on the road means that more demands are made on the road user, particularly with respect to visual acuity. Of prime importance for various visual functions is central daylight visual acuity. There is a specific relation between visual acuity, speed and stopping distance. The recommendations of the German ophthalmological society for evaluating driving aptitude lay down definite values for this visual acuity, which result in the assessment of "fit", or "conditionally fit". Twilight visual acuity, dark adaptation, sensitivity to glare are important criteria for night-time driving aptitude. Tinted spectacles or windscreens should not be used to protect against glare because of their negative effects on twilight visual acuity. A driver's field of vision is also important for driving aptitude. The requirements of the field of vision are also set out in the recommendations. Visual acuity with respect to moving objects and twilight visual cuity were shown to be particularly age-dependent. (TRRL) covering abstract of the conference see IRRD no 311241.

  • Corporate Authors:

    Deutsches Gruenes Kreuz

    Schuhmarkt 4
    Marburg,   Germany 
  • Authors:
    • Merte, H J
    • Sipp, V
  • Publication Date: 1978


  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00316200
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: Feb 6 1981 12:00AM