Archives of Ophthalmology · 1937 · 16 citations · 0 references
MedicineOphthalmologyPhysiologyClinical OptometryVisual PerceptionVisual PsychophysicsDark Adaptation TestingLight PerceptionVisual AdaptationDark AdaptationDark Adaptation Curve AnalysisDark Adaptation InstrumentationDark Adaptation MechanismsDark Adaptation Time ConstantLight Adaptation
On several occasions I have presented data obtained by the examination of eyes for the study of dark adaptation.<sup>1</sup> These tests were quantitative and required the instillation of a miotic which was occasionally objected to by the patient. Then, too, the procedure was a time-consuming one, since it took about one-half hour for the actual study to be made and a like amount of time for the plotting of a graph. In an extensive study of unselected cases one expects to find a large number of normal persons with normal dark adaptation. It was therefore felt that much time could be saved if a simpler device was used which would quickly eliminate this group of normal persons. With such a test only a single reading of the minimum light visible is taken, with the light as the constant and time as the variable. This is in