验光单不会吧~~~~~~ 还有一个: https://gss0.baidu.com/7LsWdDW5_xN3otqbppnN2DJv/%B4%CB%CB%A7%B8%E7%BD%FB%D6%B9%C3%D4%C1%B5/pic/item/41e2fd0e4b63fe5294ca6b31.jpg