US notation

6 meter notation

Decimal notation

MAR

logMAR

VAS

20/10

6/3

2.0

0.5

-0.3

115

20/12.5

6/3.8

1.6

0.63

-0.2

110

20/16

6/4.8

1.25

0.8

-0.1

105

20/20

6/6

1.0

1.0

0.0

100

20/25

6/7.5

0.8

1.25

0.1

95

20/32

6/9.5

0.63

1.6

0.2

90

20/40

6/12

0.50

2.0

0.3

85

20/50

6/15

0.40

2.5

0.4

80

20/63

6/18

0.32

3.2

0.5

75

20/80

6/24

0.25

4.0

0.6

70

20/100

6/30

0.20

5.0

0.7

65

20/125

6/38

0.16

6.3

0.8

60

20/160

6/48

0.125

8.0

0.9

55

20/200

6/60

0.10

10.0

1.0

50

20/250

6/75

0.08

12.5

1.1

45

20/320

6/95

0.06

16

1.2

40

20/400

6/120

0.05

20

1.3

35

20/500

6/150

0.04

25

1.4

30