Value of Two Prisms Stacked in the Same Direction (Prism Diopters)
1st Prism
2nd Prism
10Δ
20Δ
30Δ
40Δ
50Δ
10Δ
21
33
46
60
77
20Δ
33
47
66
89
122
30Δ
46
66
94
141
264
40Δ
60
89
141
339
50Δ
77
122
256
strabismus