Safety and Visual Outcome of Visian Toric ICL Implantation after Corneal Collagen Cross-Linking in Keratoconus: Up to 2 Years of Follow-Up
Table 1
Refractive data at baseline, 6 months after CXL, and 1 and 6 months after Visian toric ICL implantation for keratoconus ( eyes).
Parameter (mean ± SD)
Preoperatively
6 M after CXL a value*
6 M after ICL b value*
12 M after ICL c value*
UDVA ()
1.57 ± 0.50
1.57 ± 0.56 1.000
0.17 ± 0.06 <0.001
0.17 ± 0.06 1.000
CDVA ()
0.17 ± 0.08
0.15 ± 0.06 0.231
0.11 ± 0.05 <0.001
0.11 ± 0.05 1.000
Sphere (D)
−8.37 ± 3.89
−8.18 ± 3.64 0.611
−1.38 ± 0.96 <0.001
−1.36 ± 0.94 1.000
Cylinder (D)
2.95 ± 1.40
2.74 ± 1.33 0.012
1.12 ± 0.68 <0.001
1.03 ± 0.60 0.094
SE (D)
−6.96 ± 3.68
−6.81 ± 3.48 1.000
−0.86 ± 0.86 <0.001
−0.83 ± 0.76 1.000
(flat) (D)
46.52 ± 3.72
46.23 ± 3.21 0.588
45.95 ± 3.79 0.007
45.94 ± 3.79 1.000
(steep) (D)
50.49 ± 4.42
49.55 ± 4.18 <0.001
49.03 ± 4.61 <0.001
48.98 ± 4.65 0.587
(max) (D)
53.08 ± 5.17
52.01 ± 4.87 <0.001
51.55 ± 4.78 <0.001
51.55 ± 4.75 1.000
CXL: corneal collagen cross-linking; ICL: implantable collamer lens; SD: standard deviation; UDVA: uncorrected distance visual acuity; CDVA: corrected distance visual acuity; D: diopters; : keratometry values. * value derived from post hoc analysis. aComparing 6 months after CXL to preoperative value. bComparing 6 months after ICL to preoperative value. cComparing 12 months after ICL to 6 months after ICL value.