Circadian rhythms of visual accommodation responses and physiological correlations.Use of a recently developed servocontrolled infrared optometer to continuously record the state of monocular focus while subjects viewed a visual target for which the stimulus to focus was systematically varied. Calculated parameters form recorded data - e.g., speeds of accommodation to approaching and receding targets, magnitude of accommodation to step changes in target distance, and amplitude and phase lag of response to sinusoidally varying stimuli were submitted to periodicity analyses. Ear canal temperature (ECT) and heart rate (HR) rhythms were also recorded for physiological correlation with accommodation rhythms. HR demonstrated a 24-hr rhythm, but ECT data did not.
Document ID
19720044640
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Murphy, M. R.
Randle, R. J.
Williams, B. A. (NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Subject Category
Biosciences
Meeting Information
Meeting: Aerospace Medical Association, Annual Scientific Meeting