在斜视领域中,已证明垂直三棱镜能永久或暂时地减轻由于视轴垂直性偏斜所引起的症状。它虽有着某些缺点(不美观、难于计算镜力、不能有效地解决由于眼镜而引起的垂直性不平衡),但这并不时常出现,不妨碍大多数有垂直性肌力不平衡的患者对三棱镜加以利用。事实上,垂直性肌力不平衡极少是“两眼在90°经线上镜力不平衡的结果”。 In the field of strabismus, vertical prisms have been shown to reduce, permanently or temporarily, the symptoms caused by the vertical skewness of the optic axis. Although it has some shortcomings (not beautiful, difficult to calculate the lens power, can not effectively solve the vertical imbalance caused by glasses), but this does not often appear, without prejudice to most patients with vertical imbalance of muscle strength Use the prism. In fact, the vertical imbalance of muscular strength is rarely “the result of the unbalance of the two lenses on the 90 ° warp.”