RECOVERY OF FOVEAL DARK ADAPTATION
A CONTINUING PROBLEM IN NIGHT DRIVING IS THE EFFECT OF GLARE SOURCES, AS ONCOMING HEADLIGHTS, ON THE VISUAL SENSITIVITY OF THE DRIVER. THIS STUDY WAS UNDERTAKEN TO DETERMINE THE EFFECT ON DARK ADAPTED FOVEAL ACUITY OF BRIEF, BRIGHT SOURCES OF LIGHT. ALL MEASURES WERE MADE WITH A HECHT-SHLAER ADAPTOMETER. A SERIES OF DARK ADAPTATION CURVES ARE PRESENTED. REGULAR FAMILIES OF CURVES WERE FOUND FOR EACH SUBJECT' THE INITIAL THRESHOLD AND THE TOTAL TIME TO READAPT VARIED SYSTEMATICALLY WITH THE INTENSITY AND DURATION OF THE ADAPTATION SOURCE. TWO OTHER QUESTIONS THAT WERE INVESTIGATED WERE THE SIZE OF THE ADAPTING FIELD, AND THE LENGTH OF EXPOSURE TIME BEYOND WHICH NO FURTHER EFFECTS WERE FOUND. VARIOUS PRODUCTS OF INTENSITY AND TIME OF THE GLARE SOURCES HAVE BEEN COMPARED.
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Supplemental Notes:
- Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
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Authors:
- Kinney, Jo Ann S
- Connors, Mary M
- Publication Date: 1965
Media Info
- Media Type: Print
- Features: Figures; References;
- Pagination: pp 35-40
- Monograph Title: Night Visibility 1963 and 1964
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Serial:
- Highway Research Record
- Issue Number: 70
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Alternatives analysis; Drivers; Glare; Headlamps; Night visibility; Time; Vision; Visual perception
- Uncontrolled Terms: Intensity
- Old TRIS Terms: Driver vision; Foveal sensitivity; Hecht-shalaer adaptometer
- Subject Areas: Highways; Safety and Human Factors;
Filing Info
- Accession Number: 00219546
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Dec 12 1994 12:00AM