Corneal Cross-Linking as Treatment in Pediatric Keratoconus: Comparison of Two Protocols
Table 2
Intergroup comparison of the delta in outcomes at 6 and 12 months after the procedure.
Variable, mean ± SD
A-CXL
S-CXL
value
A-CXL
S-CXL
value
Delta after 6 months
Delta after 12 months
UCDVA (logMAR)
−0.1 ± 0.7
−0.3 ± 0.7
0.66
0.1 ± 0.5
−0.6 ± 0.8
0.03
BCDVA (logMAR)
−0.05 ± 0.3
−0.1 ± 0.3
0.79
−0.1 ± 0.3
−0.2 ± 0.2
0.77
EDC (cells/mm2)
−18.0 ± 70.0
−21.4 ± 56
0.48
−22.3 ± 11.7
−28.0 ± 9.0
0.34
Kmax (D)
0.4 ± 2.3
−0.3 ± 1.3
0.40
0.2 ± 2.1
−0.7 ± 2.3
0.20
K1flat front (D)
−0.4 ± 0.6
0.2 ± 0.8
0.03
−0.1 ± 0.9
0.4 ± 1.9
0.29
K2steep front (D)
−0.3 ± 1.0
0.2 ± 1.1
0.21
−0.1 ± 1.3
−0.1 ± 1.0
0.95
Kmean front (D)
0.2 ± 0.8
−0.4 ± 0.8
0.07
−0.1 ± 1
0.2 ± 1.5
0.49
Astigmatism front (D)
−0.1 ± 1.2
0.1 ± 0.5
0.61
−0.04 ± 1.2
−0.2 ± 0.7
0.79
Astigmatism back (D)
−0.1 ± 0.2
−0.1 ± 0.2
0.12
−0.1 ± 0.2
0.7 ± 1.7
0.26
Pachymetry center (μm)
−7.8 ± 22.2
−16.6 ± 16.4
0.29
−7.1 ± 18.6
−3.4 ± 42.5
0.80
Pachymetry thinnest point (μm)
−9.8 ± 23.3
−11.0 ± 21.3
0.90
−11.8 ± 14.6
−29.8 ± 30.2
0.12
SD: standard deviation; delta: value after operation–value before operation; D: diopter; UCDVA: uncorrected distance visual acuity; BCDVA: best corrected distance visual acuity; K: keratometry; EDC: endothelial density count.
