The role of drivers' vision in road safety

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Abstract
The literature on relationships between drivers' vision and their driving performance is reviewed. Certain vision tests, particularly those which use moving targets, are weakly associated with measures such as accident frequency and rate; their practical value in terms of road safety is very limited. Some visual abilities, such as extent of visual field, are unassociated with driving performance in general but may be relevant to specific types of accident; any association for tests of night vision remains open to question. Methodological problems are considered and possible reasons why associations are not stronger are discussed. Development of a new rapid test of contrast sensitivity function is mentioned together with some current and future research plans.

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