Bedell H E, Barbeito R, Aitsebaomo P A
Vision Res. 1984;24(10):1157-61. doi: 10.1016/0042-6989(84)90170-6.
We compared stability of fixation midway between two targets (separated horizontally by from 1 to 12 deg) to precision in specifying these targets' oculocentric directions. Unsteadiness of fixation tended to parallel changes in the precision of direction for larger target separations, but was worse than predicted from an addition of estimated oculomoter and sensory variabilities. The data are consistent with the notion that oculocentric direction provides the sensory signals used to maintain fixation, but to account for the magnitude of fixational instability another source of variability, possibly related to attention, must also be considered.
我们比较了在两个目标（水平间距为1至12度）之间中点处的注视稳定性与确定这些目标的眼心方向的精度。对于较大的目标间距，注视的不稳定性倾向于与方向精度的变化平行，但比通过叠加估计的眼动和感觉变异性所预测的情况更差。这些数据与以下观点一致，即眼心方向提供了用于维持注视的感觉信号，但为了解释注视不稳定的程度，还必须考虑另一个可能与注意力有关的变异性来源。
