Stark Lawrence R, Strang Niall C, Atchison David A
School of Optometry, Queensland University of Technology, Victoria Park Road, Kelvin Grove, Queensland 4059, Australia.
J Opt Soc Am A Opt Image Sci Vis. 2003 Dec;20(12):2228-36. doi: 10.1364/josaa.20.002228.
It has been suggested that in the presence of astigmatism some individuals make cyclic changes in focus over the astigmatic interval to obtain better visual performance. The aim in the present study was to identify such cyclic accommodative behavior and to characterize the variability of the response in the presence of astigmatism. The dynamic accommodation response in the presence of induced astigmatism was recorded objectively with an infrared optometer in seven young adults. Astigmatism led directly to increased accommodative variability in certain individuals. In two of seven participants there was evidence for aperiodic cyclic accommodative responses between different portions of the astigmatic interval. However, the amplitude of these tracking responses was much smaller than the astigmatic interval.
有人提出，在存在散光的情况下，一些人会在散光区间内进行周期性的焦点变化，以获得更好的视觉表现。本研究的目的是识别这种周期性的调节行为，并描述在散光存在时反应的变异性。用红外验光仪客观记录了7名年轻成年人在诱导散光情况下的动态调节反应。散光直接导致某些个体的调节变异性增加。在7名参与者中的2名中，有证据表明在散光区间的不同部分之间存在非周期性的周期性调节反应。然而，这些跟踪反应的幅度比散光区间小得多。
