From: Automatic method of analysis and measurement of additional parameters of corneal deformation in the Corvis tonometer
p r
0.1
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
a 1 [pixel]
22
25
26
27
28
29
30
a 2 [pixel]
119
107
102
101
100