Research Article
Comparison of Long-Term Outcomes and Refractive Stability following SMILE versus SMILE Combined with Accelerated Cross-Linking (SMILE XTRA)
Table 2
Postoperative data at mean follow-up.
| | Parameter (mean ± SD) | SMILE (n = 54) | SMILE XTRA (n = 54) | value |
| | Longest follow-up (months) | 22.18 ± 10.41 | 21.81 ± 9.19 | 0.89 | | UDVA (logMAR) | −0.05 ± 0.07 | −0.06 ± 0.08 | 0.56 | | Sphere (D) | −0.037 ± 0.14 | −0.060 ± 0.25 | 0.55 | | Cylinder (D) | −0.09 ± 0.20 | −0.14 ± 0.28 | 0.28 | | SE (D) | −0.08 ± 0.18 | −0.13 ± 0.33 | 0.34 | | CDVA (logMAR) | −0.08 ± 0.06 | −0.09 ± 0.05 | 0.37 | | K1 (D) | 39.63 ± 1.61 | 40.50 ± 2.03 | 0.007 | | K2 (D) | 40.44 ± 1.62 | 41.44 ± 2.02 | 0.005 | | Corneal astigmatism (D) | 0.82 ± 0.39 | 0.84 ± 0.40 | 0.90 | | CCT (μ) | 455.33 ± 29.57 | 442.85 ± 26.65 | 0.02 | | Thinnest pachymetry (μ) | 453.01 ± 29.23 | 440.35 ± 25.97 | 0.01 |
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UDVA: uncorrected distance visual acuity; D: diopter; SE: spherical equivalent; CDVA: corrected distance visual acuity; K: keratometry; CCT: central corneal thickness.
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