Jiang B C
Shanghai Institute of Physiology, Chinese Academy of Sciences, Shanghai.
Am J Optom Physiol Opt. 1988 Oct;65(10):809-13.
To evaluate the observer's ability to self-monitor and correct accommodation voluntarily, a slit aperture, incorporating the Scheiner principle, was used as an accommodative stimulus. The Scheiner image consisted of two horizontal lines, which were perceived as superimposed into a single line when the observer's accommodation was conjugate with the optical distance of the target. The observer's task was to maintain superimposition of the monocularly viewed lines. During the task, accommodation was assessed with a Badal optometer that incorporated gratings of several spatial frequencies. By varying the optical distance of these gratings it was possible to determine the location of minimum blur, and thus the accommodation response. Results from two observers indicated that a Scheiner image can be used effectively for voluntary adjustments in accommodation for several optical distances.
为评估观察者自主进行自我监测和纠正调节的能力，采用了一个结合施奈德原理的狭缝孔径作为调节刺激。施奈德图像由两条水平线组成，当观察者的调节与目标的光学距离共轭时，这两条线会被视为叠加成一条单线。观察者的任务是保持单眼观察到的线的叠加状态。在任务过程中，使用一台装有几种空间频率光栅的巴达尔验光仪来评估调节。通过改变这些光栅的光学距离，可以确定最小模糊点的位置，从而确定调节反应。两名观察者的结果表明，施奈德图像可有效地用于对多个光学距离的调节进行自主调整。
