在检查复性散光中,球镜部分与柱镜部分交织在一起,容易使球镜部分代替柱镜部分,或是在球镜部分未满足前,误将柱镜轴向置于相反方向而代替球部部分。如何精确地测出低度散光,测定球镜、散光度数及散光轴向,实属重要。尤其对有视疲劳症状 In the examination of refraction astigmatism, ball mirror and the cylinder part of the intertwined, easy to make the ball instead of part of the cylinder, or in the ball before the partial unmet, the cylinder axis by mistake placed in the opposite direction instead of Ball part. How to accurately measure low astigmatism, measuring the spherical, astigmatism and axial astigmatism, it is important. In particular, there are symptoms of fatigue