Table 7 Descriptive analysis of the studied eyes according to I-Trace between 3 months and 1 year
I–Trace | Post operation 3 months | Post operation 1 year | p |
|---|---|---|---|
Defocus (μ) | |||
Positive | |||
Min. – Max. | 0.06–0.53 | 0.02–0.36 | Zp = 0.310 |
Mean ± SD. | 0.20 ± 0.16 | 0.15 ± 0.15 | |
Median | 0.16 | 0.07 | |
Negative | |||
Min. – Max. | −0.91 – 0.0 | − 0.10 – –0.01 | Zp = 0.144 |
Mean ± SD. | − 0.38 ± 0.39 | −0.05 ± 0.04 | |
Median | −0.30 | − 0.05 | |
Astig (μ @) | |||
Min. – Max. | 0.05–0.57 | 0.03–0.62 | Zp = 0.256 |
Mean ± SD. | 0.21 ± 0.15 | 0.24 ± 0.19 | |
Median | 0.16 | 0.17 | |
HO Total (μ) | |||
Min. – Max. | 0.06–0.32 | 0.06–0.50 | Zp = 1.000 |
Mean ± SD. | 0.16 ± 0.08 | 0.16 ± 0.11 | |
Median | 0.16 | 0.13 | |
Coma (μ @) | |||
Min. – Max. | 0.02–0.18 | 0.01–0.20 | Zp = 0.875 |
Mean ± SD. | 0.07 ± 0.05 | 0.07 ± 0.05 | |
Median | 0.05 | 0.07 | |
Spherical (μ) | |||
Positive | |||
Min. – Max. | – | ||
Mean ± SD. | 0.12 | 0.03 | |
Median | |||
Negative | |||
Min. – Max. | −0.05 – 0.0 | −0.07 – 0.0 | Zp = 0.893 |
Mean ± SD. | − 0.03 ± 0.02 | −0.03 ± 0.03 | |
Median | −0.03 | − 0.02 | |
2ry Astig (μ @) | |||
Min. – Max. | 0.0–0.12 | 0.0–0.15 | Zp = 0.977 |
Mean ± SD. | 0.03 ± 0.03 | 0.04 ± 0.04 | |
Median | 0.02 | 0.02 | |
Trefoil (μ @) | |||
Min. – Max. | 0.01–0.20 | 0.02–0.34 | Zp = 0.426 |
Mean ± SD. | 0.08 ± 0.06 | 0.10 ± 0.09 | |
Median | 0.05 | 0.08 | |
RMS (mm) | |||
Min. – Max. | 2.0–3.70 | 2.0–4.0 | tp = 0.832 |
Mean ± SD. | 2.73 ± 0.52 | 2.77 ± 0.58 | |
Median | 2.60 | 2.60 | |