Demanins R, Hess R F
McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Quebec, Canada.
Vision Res. 1996 Sep;36(17):2771-94. doi: 10.1016/0042-6989(95)00318-5.
In order to understand the spatial loss in strabismic amblyopia and its relationship to the contrast sensitivity deficit, we measured alignment performance for a three element vertical alignment task in which the elements were equi-visible, spatial Gabors. We derived the threshold and bias and compared these for stimuli of different spatial scale and eccentricity. Our results suggest that: (1) the deficits for alignment thresholds and bias are uncorrelated; (2) in the majority of strabismic amblyopes, both deficits are scale invariant; (3) the form of the regional distribution depends on the spatial measure used and the scale at which it is measured; and (4) there is a poor correlation between the deficit for either spatial measure and the contrast sensitivity loss.
为了了解斜视性弱视中的空间损失及其与对比敏感度缺陷的关系，我们测量了一个三元素垂直对齐任务的对齐性能，其中元素是等可见的空间Gabor图形。我们得出了阈值和偏差，并比较了不同空间尺度和离心率刺激下的这些值。我们的结果表明：（1）对齐阈值和偏差的缺陷不相关；（2）在大多数斜视性弱视患者中，这两种缺陷都是尺度不变的；（3）区域分布的形式取决于所使用的空间测量方法及其测量尺度；（4）任何一种空间测量的缺陷与对比敏感度损失之间的相关性都很差。
