THE DYNAMIC RESPONSE OF VISUAL ACCOMMODATION OVER A SEVEN – DAY PERIOD
作者:
Robert Randle,
Miles Murphy,
期刊:
American Journal of Optometry and Physiological Optics
(OVID Available online 1974)
卷期:
Volume 51,
issue 8
页码: 530-544
ISSN:0093-7002
年代: 1974
出版商: OVID
数据来源: OVID
摘要:
Four college students, ranging in age from 18 to 21 years, were tested on their dynamic, monocular accommodation responses to a square wave stimulus and sine waves of two frequencies. The tests were conducted over a period of seven days in a controlled environment, each subject being tested once every three hours. Latency, magnitude, velocity, gain and phase lag of the responses were measured, and means and standard deviations were computed. The latency of response was stable throughout and agreed fairly well with previous studies. The response magnitude was relatively stable. Three of the subjects had higher velocities on receding targets; one was faster on approaching targets. The group mean velocity increased over the seven days of the study. In keeping with the trend to faster dynamics over the seven days, both gain and phase lag improved.
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