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. 2018 Dec 28;13(12):e0209480. doi: 10.1371/journal.pone.0209480

Table 2. Approximation of axial stiffness from the slope term of the force/displacement relationship for anterior and posterior corneal stroma.

Subject Eye R2a R2p ka kp ka/kp
1 OD 0.99 0.99 0.0185 0.0160 1.156
OS 0.99 0.99 0.0156 0.0129 1.209
2 OD 0.99 0.99 0.0180 0.0161 1.118
OS 0.97 0.98 0.0173 0.0137 1.263
3 OD 0.99 0.99 0.0165 0.0144 1.146
OS 0.99 0.99 0.0180 0.0157 1.146
4 OD 0.99 0.99 0.0183 0.0153 1.196
OS 0.98 0.98 0.0182 0.0161 1.130
5 OD 0.97 0.96 0.0121 0.0120 1.008
OS 0.98 0.99 0.0179 0.0168 1.065
6 OS 0.98 0.99 0.0238 0.0227 1.048
7 OS 0.95 0.95 0.0129 0.0114 1.132
8 OD 0.93 0.94 0.0110 0.0101 1.089
OS 0.98 0.99 0.0105 0.0096 1.094
9 OS 0.97 0.98 0.0176 0.0161 1.093
10 OD 0.96 0.97 0.0092 0.0084 1.095
OS 0.99 0.99 0.0113 0.0102 1.108
mean 0.98 0.98 0.0157 0.0140 1.123
standard deviation 0.02 0.02 0.0039 0.0035 0.062

R2a and R2p: R2 of the linear fit of the slope for the anterior (a) and posterior (p) force/displacement relationship. ka and kp: slope of the force/displacement function for anterior (a) and posterior (p) corneal stromal regions.