Corneal Safety and Stability in Cases of Small Incision Lenticule Extraction with Collagen Cross-Linking (SMILE Xtra)
Table 2
Visual acuity and refraction along the postoperative follow-up period.
1 month
3 months
6 months
12 months
24 months
SMILE Xtra: UDVA (logMAR)
0.068 ± 0.08
0.033 ± 0.07
0.031 ± 0.06
0.030 ± 0.06
0.031 ± 0.06
SMILE: UDVA (logMAR)
0.041 ± 0.07
0.031 ± 0.06
0.029 ± 0.06
0.028 ± 0.06
0.028 ± 0.05
value
0.003
0.124
0.122
0.130
0.144
SMILE Xtra: CDVA (logMAR)
0.021 ± 0.09
−0.028 ± 0.07
−0.042 ± 0.06
−0.051 ± 0.05
−0.055 ± 0.05
SMILE: CDVA (logMAR)
0.002 ± 0.07
−0.038 ± 0.06
−0.048 ± 0.06
−0.055 ± 0.06
−0.057 ± 0.05
value
<0.001
0.031
0.171
0.190
0.272
SMILE Xtra: MRSE (D)
−0.12 ± 0.23
−0.16 ± 0.25
−0.19 ± 0.21
−0.20 ± 0.21
−0.18 ± 0.19
SMILE: MRSE (D)
−0.18 ± 0.19
−0.20 ± 0.22
−0.21 ± 0.21
−0.22 ± 0.20
−0.19 ± 0.18
value
<0.001
0.038
0.267
0.278
0.361
Values are expressed as mean ± SD. SD: standard deviation; UDVA: uncorrected distance visual acuity; CDVA: corrected distance visual acuity; value compares mean of SMILE Xtra vs. SMILE using independent-samples t-test. Statistically significant.
