当你拿到一块没有标度的眼镜片时,当你在眼镜装配时,不能确定镜片的光学中心、散光镜片的轴位时,手头又没有仪器的情况下,你不妨采用下面一种简单的判定方法,能为你解决疑难。 1.定心。平持镜片,将凸面对准十字线(如窗的横档与窗杆组成的十字线,)放于眼前30cm处,以单目透过此镜片观察相距镜片1m左右的十字线,先左右旋转,上、下、左、右移动镜片,直至看到镜片内的十字象 When you get a non-scaled ophthalmic lens, when you are in the assembly of glasses, can not determine the optical center of the lens, astigmatism lens axis, there is no instrument on hand, you may wish to use the following simple Judgment, can solve problems for you. 1. Centering. Flat lens, the convex alignment crosshairs (such as the window of the crossbar and window rod composed of crosshairs,) placed in front of 30cm at a single eye through the lens to observe the cross lens about 1m away from the line, the first left and right Rotate, up, down, left and right to move the lens until you see the cross inside the lens