E视力表和C视力表的对照
5.3---------------- 2.0
5.2 --------------- 1.5
5.1 --------------- 1.2
5.0 --------------- 1.0
4.9 --------------- 0.8
4.8 --------------- 0.6
4.7 --------------- 0.5
4.6 --------------- 0.4
4.5 --------------- 0.3
4.4 --------------- 0.25
4.3 --------------- 0.2
4.2 --------------- 0.15
4.1 --------------- 0.12
4.0 --------------- 0.1