Table 1 Refractive outcomes during the follow-up period
From: Four-year observation of predictability and stability of small incision lenticule extraction
Variables | Preoperative | 6 Months postoperative | 4 Years postoperative | P (Preop to 4 years postop) | P (6 Months to 4 years postop) |
|---|---|---|---|---|---|
LogMAR UDVA | |||||
Mean ± SD | -0.05 ± 0.06 | -0.04 ± 0.06 | - | 0.094 | |
Medium(IQR) | - | -0.08(-0.08 to 0) | -0.08(-0.08 to 0) | ||
LogMAR CDVA | |||||
Mean | -0.01 ± 0.03 | -0.08 ± 0.06 | -0.08 ± 0.06 | <0.001 | 0.570 |
Medium(IQR) | 0(0 to 0) | -0.08(-0.08 to -0.08) | -0.08(-0.08 to -0.08) | ||
Sphere (D) | |||||
Mean ± SD | -5.94 ± 1.45 | 0.14 ± 0.35 | 0.05 ± 0.41 | <0.001 | 0.278 |
Range | -8.50 to -3.25 | -0.50 to 1.25 | -1.00 to 1.25 | ||
Cylinder (D) | |||||
Mean ± SD | -0.73 ± 0.49 | -0.29 ± 0.27 | -0.28 ± 0.29 | <0.001 | 0.747 |
Medium(IQR) | -0.50(-1.00 to 0) | -0.25(-0.50 to 0) | -0.25(-0.50 to 0) | ||
SE | |||||
Mean ± SD | -6.30 ± 1.47 | -0.01 ± 0.33 | -0.09 ± 0.39 | <0.001 | 0.929 |
Range | -8.75 to -3.50 | -0.75 to 0.88 | -1.00 to 0.88 | ||
The efficacy index | |||||
Mean ± SD | - | 1.11 ± 0.17 | 1.07 ± 0.16 | - | 0.275 |
Medium(IQR) | 1.0(1.0 to 1.2) | 1.0(1.0 to 1.2) | |||
The safety index | |||||
Mean ± SD | - | 1.17 ± 0.15 | 1.16 ± 0.14 | - | 0.622 |
Medium(IQR) | - | 1.2(1.0 to 1.2) | 1.2(1.0 to 1.2) | ||