屈光不正是指眼睛的屈光状态不正常。大家知道,眼睛能看到物体,是因为物体所发射出的光和物影,通过角膜、晶状体、玻璃体等屈光系统,其焦点正好落在视网膜黄斑部中心凹,形成影像,这种情况叫做正常的屈光状态。如果焦点落在视网膜前面,或者落在后面,就是不正常的屈光状态。主要表现为视力不好,看远或者看近不清楚,或者 Refractive error refers to the refractive status of the eye is not normal. We all know that the eye can see the object, because the light emitted by objects and objects, through the cornea, lens, vitreous refractive system, the focus just falls in the foveal retina, the formation of images, this situation is called Normal refractive state. If the focus falls on the retina, or fall behind, it is not normal refractive status. Mainly for poor eyesight, look far or look unclear, or