McLin L N, Schor C M
United States Air Force School of Aerospace Medicine, Radiation Sciences Division, Brooks Air Force Base, Texas.
Invest Ophthalmol Vis Sci. 1988 Nov;29(11):1739-46.
Voluntary effort can be used to elicit changes in accommodation and vergence. We investigated the potential cross-coupling interactions of accommodative vergence/accommodation (AC/A) and vergence accommodation/vergence (CA/C) in response to voluntary effort. The responses of accommodation and vergence were measured simultaneously with a dual Purkinje image eye tracker and infrared optometer while subjects viewed a Maltese cross monocularly through a pinhole pupil and made voluntary efforts to imaginary changes in target distance. The accommodation and vergence evoked by voluntary efforts occurred in a ratio that was similar to the response AC/A ratio and different from the response CA/C ratio. One exceptional subject was found who could voluntarily accommodate with one eye occluded without the usual concomitant change in vergence. These results indicate that it is primarily the focusing response that is adjusted during voluntary efforts in the near response.
自主努力可用于引发调节和聚散的变化。我们研究了在自主努力时，调节性聚散/调节（AC/A）和聚散性调节/聚散（CA/C）的潜在交叉耦合相互作用。当受试者通过针孔瞳孔单眼观察马耳他十字，并对目标距离的想象变化进行自主努力时，使用双浦肯野图像眼动仪和红外验光仪同时测量调节和聚散的反应。自主努力诱发的调节和聚散以与反应性AC/A比率相似且与反应性CA/C比率不同的比例发生。发现一名特殊受试者，其在一只眼睛被遮挡时能够自主调节，而聚散没有通常伴随的变化。这些结果表明，在近反射的自主努力过程中，主要调节的是聚焦反应。
