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- W847872009 abstract "WITH LANDOLT RINGS AS TEST PIECES, THE PROCESS OF ADAPTATION OF THE EYE TO BRIGHTNESS IN THE FIELD OF VISION DURING THE PERIOD OF CHANGE FROM DUSK TO NIGHT TIME WAS CARRIED OUT. THE EXPERIMENT WAS CONDUCTED IN THE LABORATORY WITH STATIC OBSERVERS AND FOR ONE TRIAL LENGTH OF ROAD WITH DYNAMIC OBSERVERS. DURING THE LABORATORY TRIALS THE ADAPTATION BROUGHT ABOUT A RAPID DECLINE OF THE BRIGHTNESS THRESHOLD DURING THE FIRST SECONDS. AFTER 10 SECONDS THE ADAPTATION WAS PRACTICALLY COMPLETE. THE TRIALS ON THE HIGHWAY SHOWED AMONGST OTHER POINTS, THAT THE ADAPTATION SET IN 60 METRES BEFORE THE LAST STREET LIGHT, BECAUSE THE OBSERVER HAD ALREADY AT THIS POINT STARTED TO LOOK BEYOND INTO THE DARKNESS. IN GENERAL THE ROAD TESTS SHOWED THAT THE TEST PIECES WERE FIRST RECOGNISED AT A REDUCED DISTANCE AND THE OBSERVED SHARPNESS WAS LESS THAN WAS THE CASE IN THE LABORATORY SITUATION." @default.
- W847872009 created "2016-06-24" @default.
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- W847872009 date "1976-03-01" @default.
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- W847872009 title "PROBLEMS OF ADAPTATION OF THE HUMAN EYE TO BRIGHTNESS DURING THE DUSK PERIOD" @default.
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