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vision system for safe driving ppt

In 2002 the International Council of Ophthalmology (ICO) issued a report, discussing Visual Standards, Aspects and Ranges of Vision Loss with Emphasis on Population Surveys [1] .The current report addresses individual assessment of visual functions and their relation to
functional vision in the context of Vision Requirements for Driving Safety.The purpose of this report is not to provide a set of uniform rules that can be implemented unchanged in any jurisdiction. Rather, it is aimed at providing a set of considerations for use by any group contemplating the development or refinement of driving license requirements. The 2002 ICO report distinguished several aspects of vision loss, notably Visual Functions, which describe how the eye functions and Functional Vision, which describes how the person functions in vision-related activities. For each of these aspects, various ranges of functioning can be identified, ranging from normal functioning, over mild, moderate, severe and profound loss to total loss. The traditional, simplistic, black-and-white distinction between those who are sighted and those who are blind is not tenable. A 2002 resolution by the International Federation of Ophthalmolological Societies denounced the use of the word “blindness” for those who have useable residual vision [1]. The relationship between visual functions and functional vision is complex and can be influenced by many factors. While population statistics may define average performance, individual functioning, as will be discussed in this report, can be considerably better or considerably worse than the statistical average. Traditional clinical tests determine a performance threshold. Real-life performance requires sustainable, supra-threshold performance. Establishing driving license criteria therefore is an exercise in establishing a safety margin between performance on clinical tests and performance in actual traffic, rather than a cut-off value between competence and incompetence. Ultimately, driving safety does not depend so much on what is seen, but rather on how quickly
and how adequately drivers respond to what is seen.Section 3 – Vision Loss and Driving Safety In our society losing one’s driving license has major social consequences. Vision is the most important source of information during driving and many driving related injuries have been
associated with visual problems. Visual assessment for driving is thus a major health issue. This paper was developed to explore ways in which the ICO could contribute towards global harmonization in this important area. It lists many sensitive questions. A literature review shows that there is a relationship between the safety margin established by vision-related driving license requirements and actual driving performance, but that this relationship is generally weak.

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