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在验光配镜中,对于散光的处理,大家往往感到很棘手。到底什么时候给加,什么时候不用加,很难决定。一般来说,散光的矫正原则是依据视力和视疲劳的情形而决定的。如果其中任何一个症状存在,即使散光度很小,也应尽量矫正。如果散光度数高,也应分次矫正,让患者逐渐适应。知道了散光的矫正原则后,还要掌握一定的“火候”,即散光的轴要找准,度数不可过矫,以免适得其反,给患者造成新的屈光不正。那么如何把握这个“火侯”呢?下面笔者向大家介绍一种主观验光中常用的“交叉柱镜法”。
Optometry, the treatment of astigmatism, we often feel very difficult. When to add in the end, when not to add, it is difficult to decide. In general, the correction of astigmatism is based on visual acuity and visual fatigue. If any one of these symptoms, even if the astigmatism is small, should also be corrected. If the degree of astigmatism, should also be corrected in stages, so that patients gradually adapt. Know the principle of correction of astigmatism, but also to master a certain “heat”, that is, to ascertain the axis of astigmatism, the degree can not be overcorrected, so as to avoid being counterproductive, giving patients new refractive errors. So how to grasp the “fire Hou”? Here I introduce to you a subjective refraction in the commonly used “cross cylinder method.”