Effect Of Flashes Of Light On Night Visual Acuity

The purpose of the study was to find the ability of the eye to see a dark object against a sky background at night after the eye had been exposed to a flash of light or a series of flashes. This capacity of the eye was measured by varying the width of a vertical dark stretched across a circular bright patch 8© in diameter. A point 5© to the left of center of the patch was fixated with the right eye. The brightness of this patch varied from zero to 0.0107 ml. and was observed through a 2 mm. artificial pupil.

This is a summary of reports issued since 1947 under the aegis of the National Research Council's Committee on Vision. An abstract summarizing the contents of each report is provided together with information to assist the reader in obtaining copies of the information about early research efforts in such classic areas of vision science as visual search, form discrimination, and agingâ€"together with current problems such as the use of video display terminals. The book will aid vision scientists in gaining a thorough understanding of the recent historical context of vision research.