Holopigian K, Blake R, Greenwald M J
Department of Psychology, Northwestern University, Evanston, Illinois.
Invest Ophthalmol Vis Sci. 1988 Mar;29(3):444-51.
In individuals with abnormal binocular vision, such as strabismics and anisometropes, it is common for all or part of one eye's view to be suppressed so binocular confusion and diplopia are eliminated. We examined the relation between the depth of suppression (the amount by which the monocular contrast increment threshold for an eye was elevated by stimulation in the contralateral eye) and the degree of amblyopia (difference in monocular contrast thresholds for the two eyes). There was a significant negative correlation between suppression and amblyopia, so that clinical suppressors with no amblyopia exhibited deep suppression (ie, large threshold elevation) while observers with amblyopia exhibited weaker or no suppression. This negative correlation was found when the two eyes viewed orthogonally oriented contours as well as identically oriented contours. These results suggest that when an eye is amblyopic there is no longer a need for strong suppression of that eye by the contralateral eye.
在双眼视觉异常的个体中，如斜视患者和屈光参差患者，一只眼睛的全部或部分视野被抑制是很常见的，这样就消除了双眼混淆和复视。我们研究了抑制深度（对一只眼睛而言，对侧眼的刺激使其单眼对比度增量阈值升高的量）与弱视程度（两眼单眼对比度阈值的差异）之间的关系。抑制与弱视之间存在显著的负相关，因此没有弱视的临床抑制者表现出深度抑制（即阈值大幅升高），而有弱视的观察者表现出较弱的抑制或没有抑制。当两眼观察正交取向的轮廓以及相同取向的轮廓时，都发现了这种负相关。这些结果表明，当一只眼睛弱视时，对侧眼不再需要对其进行强烈抑制。
