Blank K, Enoch J M
Science. 1973 Oct 26;182(4110):393-5. doi: 10.1126/science.182.4110.393.
Contraction of the ciliary muscle during marked accommodation causes the leading edge of the retina to advance as much as 0.5 centimeter. Near the posterior pole of the eye, the upward and downward extensional strains on the retina should be reasonably balanced. In the horizontal meridian an asymmetry is introduced because of the nasal location of the optic nerve head. Observers were asked to bisect the space between two parallel lines while fixating a movable line lying near the midpoint of the two lines. The test was conducted with the target far from and near the subject, in the horizontal and vertical meridians, and was repeated with accommodation paralyzed by a cycloplegic agent. Marked accommodation induced significant spatial distortions in the horizontal meridian. The effect is largely retinal.
在明显的调节过程中，睫状肌收缩会使视网膜的前缘向前推进多达0.5厘米。在眼球后极附近，视网膜上的上下拉伸应变应合理平衡。在水平子午线上，由于视神经乳头位于鼻侧，会产生不对称性。要求观察者在注视位于两条平行线中点附近的一条可移动线时，将两条平行线之间的空间平分。该测试在水平和垂直子午线上，分别在目标远离和靠近受试者的情况下进行，并在使用睫状肌麻痹剂使调节麻痹后重复进行。明显的调节在水平子午线上引起了显著的空间扭曲。这种效应主要是视网膜性的。
