微小度数斜视用一般方法检查容易漏诊。遮盖试验可能阴性或遮盖健眼时斜眼注视运动可能没有。微小度数斜视常常出现小的中心性抑制性暗点(1°～2°)。在各种使用的试验中,4△三棱镜试验是一种简单而快速的方法,可用来确定有无中心凹抑制。近几年我们应用本试验于23例微小度数斜视均取得了阳性反应。 Micro-degree strabismus with the general method of inspection is easy to miss. Hiding test may be negative or cover eye health, squint may not have eye movement. Small degree of strabismus often appear small central inhibitory dark spots (1 ° ~ 2 °). In various tests of use, the 4Δ prism test is a simple and quick method to determine the presence or absence of a foveal depression. In recent years, we applied this test in 23 cases of micro-degree strabismus have achieved a positive response.