r s c ai8 +0.25 -0.50 25i8 +0.25 -0.5 30S.E. +0.00L S C AI6 +1.25 -1.25 170I6 +0.25 +1.00 75S.E. +0.75PD=63mmi8 和 i6 是啥意思。另外,在眼科检查时,视力才0.7,而在验光处检查,竟然说全都正常,这两者有啥区别吗。