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October 1970

Vision and Highway Safety. By Merrill J Allen.

Arch Ophthalmol. 1970;84(4):556. doi:10.1001/archopht.1970.00990040558043

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This book serves as an excellent companion to the book review on The Proceedings of the 11th Annual Meeting of the American Association for Automotive Medicine, for the latter outlines all the factors involved in highway safety, setting the problem in perspective.

Vision and highway safety then takes one of these factors, namely vision, and gives it in-depth treatment.

Professor Allen, a respected member of the faculty of the University of Indiana School of Optometry, is well known for his long-time interest in visual problems on the highway.

Of the many parts of the automobile that might be designed better from a visual standpoint, the author points out that the windshield is probably the major culprit. Its stylish 60° angle from the horizontal is responsible for losing 20% of all the incident light to reflection. If the windshield is tinted as well as tilted, almost 48% of the incident light

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