Three-Year Outcomes of Cross-Linking PLUS (Combined Cross-Linking with Femtosecond Laser Intracorneal Ring Segments Implantation) for Management of Keratoconus

Table 4

The summary of the refractive data of the six complicated eyes (group B).

Parameters	Preoperative data (mean ± SD)	3 months following CXL PLUS (mean ± SD)	36 months following epithelium-off CXL (mean ± SD)
Mean K reading average (D)	49.52 ± 0.93	50.18 ± 0.59	48.06 ± 0.42
Mean corneal thickness at thinnest location, (μm)	453 ± 37.81	429 ± 31.05	399 ± 53.89
Mean postoperative myopic correction (D)	—	—	1.02 ± 0.47
Mean astigmatism (D)	5.96 ± 1.58	6.46 ± 0.87	4.62 ± 1.14
Mean postoperative astigmatic correction (D)	—	—	1.76 ± 0.25
Mean UCVA (logMAR)	1.12 ± 0.60	1.30 ± 0.52	0.90 ± 0.28
Mean BCVA (logMAR)	0.82 ± 0.30	1.00 ± 0.40	0.70 ± 0.25