North R V, Sethi B, Owen K
Laboratory of Experimental Optometry, University of Wales, College of Cardiff, UK.
Ophthalmic Physiol Opt. 1990 Jan;10(1):81-5.
Previous studies have shown that subjects with normal binocular vision adapt to prism-induced phorias. However, there are conflicting reports as to the amount of adaptation shown to horizontal prisms. Some investigations found a greater amount of adaptation to base out prisms compared with base in, whilst others found the reverse and one study found no adaptation to base out prism at all. This study investigated the adaptation response to horizontal prisms at distance and near in a larger number of subjects (n = 40). The results confirmed our previous findings and showed that at distance the adaptation responses are asymmetrical, there being a significantly greater amount of adaptation to base out prism compared with base in, whilst at near the responses are virtually symmetrical. Possible reasons for these findings are discussed.
先前的研究表明，具有正常双眼视觉的受试者能够适应棱镜诱发的隐斜。然而，关于水平棱镜所显示的适应量，存在相互矛盾的报告。一些研究发现，与底向内棱镜相比，对底向外棱镜的适应量更大，而另一些研究则发现情况相反，还有一项研究发现对底向外棱镜根本没有适应。本研究调查了大量受试者（n = 40）在远距离和近距离对水平棱镜的适应反应。结果证实了我们先前的发现，表明在远距离时，适应反应是不对称的，与底向内棱镜相比，对底向外棱镜的适应量显著更大，而在近距离时，反应几乎是对称的。文中讨论了这些发现的可能原因。
