Ophthalmologic examinations under the acute influence of alcohol |
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| Institution: | 1. Institute of Legal Medicine, University Hospital Düsseldorf, Germany;2. Institute of Mathematics, Heinrich-Heine-University, Düsseldorf, Germany;3. Augenzentrum Friedrichstadt, Düsseldorf, Germany;1. Institute of Legal Medicine, University Hospital Düsseldorf, Germany;2. Federal Armed Forces Hospital, Koblenz, Germany;3. Institute of Mathematics, Heinrich-Heine-University, Düsseldorf, Germany;1. Ege University, Faculty of Medicine, Department of Forensic Medicine, Izmir, Turkey;2. Ataturk University Hospital, Department of Internal Medicine, Division of Geriatrics, Erzurum, Turkey;3. Bozyaka Education and Research Hospital, Izmir, Turkey;4. Ege University, Faculty of Medicine, Department of Internal Medicine, Division of Geriatrics, Izmir, Turkey;5. Morgue Specialization Department of the Forensic Medicine Institute, Izmir, Turkey;1. Manhattan Retina and Eye Consultants, New York, New York;2. New York University Langone Health and Grossman School of Medicine, New York, New York;3. Massachusetts Eye and Ear, Boston, Massachusetts;4. Department of Ophthalmology and Visual Science Yale University School of Medicine, Yale University Meriden, Connecticut |
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| Abstract: | Alcohol is the most widely used recreational drug in Western countries. It affects the psychophysical performance in different ways, e.g. by reducing cognitive functions, causing coordination disturbances or impairing vision. Visual impairments both concern oculomotor and visual sensory functions, such as decreased mesopic vision, decreased field of vision and an increase of saccadic eye movements.During cycling trials with alcoholised test persons, repeated measurements of (1.) the time needed to read a 50-word text, (2.) the time to perform a swing test by tenfold touching the moving fingertip of the examiner, and (3.) the amplitude of fusion were carried out.The results of these tests were further evaluated to test the hypothesis that impaired vision is significantly correlated to reduced cycling performances of alcoholised persons. In a second step, it was examined which test is most useful to identify alcohol intoxicated cyclists.The ophthalmologic examination results of the groups of best and worst cycling-performing test persons at blood alcohol levels between 0.10% and 0.15% were set into relation to the documented allocated demerits. Additionally, the individual results of these persons were compared to the state of soberness.The time needed to read a 50-word text significantly correlated with the cycling performance. As this is an easy and objective test, it might contribute to a synoptic evaluation of the psychophysical performance of a drunken cyclist. |
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| Keywords: | Blood alcohol concentration Nystagmus Swing-test 50-Words test Amplitude of fusion Cycling |
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