Fogt N, Jones R
Ohio State University College of Optometry, Columbus, USA.
Vision Res. 1998 Feb;38(3):411-21. doi: 10.1016/s0042-6989(97)00142-9.
Fixation disparities (FD) were measured as a function of forced vergence using binocular scleral search coils and simultaneously with nonius lines. The slope of the objective FD curve was significantly greater than the subjective FD curve for three of five subjects. This indicates an alteration in retinal correspondence of up to one degree, that shifts Panum's area to avoid the diplopia normally present with large disparities. This process allows for fusion in the presence of large objective fixation disparities which would normally cause diplopia. The shift in correspondence enhances the range of forced vergence, since the larger objective FDs serve as more effective stimuli to fusional vergence. The remaining subjects who lacked this effect had "flat" FD curves indicative of high vergence adaptation.
使用双眼巩膜搜索线圈并同时结合斜视钩测量作为强迫性聚散函数的注视差异（FD）。在五名受试者中，有三名受试者的客观FD曲线斜率显著大于主观FD曲线斜率。这表明视网膜对应发生了高达一度的改变，这种改变会使潘诺氏区移位，以避免通常因大差异而出现的复视。这一过程使得在存在通常会导致复视的大的客观注视差异的情况下仍能实现融合。对应关系的改变扩大了强迫性聚散的范围，因为更大的客观FD作为融合性聚散的更有效刺激。其余没有这种效应的受试者具有“平坦”的FD曲线，表明其聚散适应能力较高。
