Table 5.
Corneal aberrometric based on Zernike polynomials data before-fitting and after 3 months of contact lens wear
| Variable (6-mm pupil) |
Pre-fitting | After 3 months of CL wear | |||
|---|---|---|---|---|---|
| Mean (SD) | Median (range) | Mean (SD) | Median (range) | P value | |
| Anterior corneal surface | |||||
| HOA RMS (μm) | 3.02 (0.56) | 3.28 (0.55 to 7.28) | 4.14 (2.65) | 2.38 (1.06 to 10.77) | 0.380 |
| Coma RMS (μm) | 2.47 (0.53) | 2.66 (0.11 to 5.58) | 2.94 (1.68) | 2.08 (0.50 to 5.82) | 0.653 |
| SA (μm) | − 0.21 (0.23) | − 0.17 (− 2.01 to 1.41) | − 0.30 (0.82) | − 0.06 (− 2.99 to 0.51) | 0.110 |
| Residual RMS (μm) | 1.50 (0.30) | 1.32 (0.53 to 4.22) | 2.51 (2.22) | 1.10 (0.67 to 9.70) | 0.779 |
| Posterior corneal surface | |||||
| HOA RMS (μm) | 0.76 (0.16) | 0.7 (0.13 to 1.99) | 0.89 (0.43) | 0.84 (0.21 to 1.73) | 0.765 |
| Coma RMS (μm) | 0.60 (0.13) | 0.59 (0.06 to 1.54) | 0.68 (0.33) | 0.70 (0.14 to 1.25) | 0.806 |
| SA (μm) | 0.08 (0.08) | 0.04 (− 0.46 to 0.63) | 0.01 (0.22) | − 0.06 (− 0.21 to 0.77) | 0.634 |
| Residual RMS (μm) | 0.38 (0.10) | 0.33 (0.11 to 1.31) | 0.48 (0.29) | 0.36 (0.11 to 1.21) | 0.399 |
SD = standard deviation; RMS = root mean square; HOA = high-order aberrations; SA = spherical aberration