Actual Value in Prism Diopter with two horizontal prisms

PD 20 25 30 35 40 45 50
20 42 47 53 59 65 71 78
25 47 53 59 66 72 79 86
30 53 59 66 73 80 87 94
35 59 66 73 80 87 95 103
40 65 72 80 87 95 104 113
45 71 79 87 95 104 113 123
50 78 86 94 103 113 123 133