4周儿童视力检查结果怎么看？

视力表检查双眼视力0.5。机器检查结果如下:R  6  S +1.5   C -0.75    A  7                                         L  8  S +1.00  C-0.50     A  7                                             Child(6 & under)                                          !! CAL !!完全看不懂，求解答: