Abstract
Good vision is absolutely necessary for a safe participation in road traffic. The visual functions which are important for the car driver, e.g. visual acuity, visual field, mesopic vision and glare, ocular motility, colour vision and stereoscopic vision are discussed including the current regulations in Germany. Data are presented demonstrating the influence of poor vision on traffic accidents. These problems are especially relevant for the older car driver who reaches his limits especially during night time. (Author/publisher)