Table 2.

Refractive and tomographic changes after transepithelial re-crosslinking.

	Before re-crosslinking	3 months		6 months		12 months		24 months
(n = 21)	Mean ± SD	Mean ± SD	p	Mean ± SD	p	Mean ± SD	p	Mean ± SD	p
UCVA	1.02 ± 0.32	1.03 ± 0.32	1.000	1.07 ± 0.38	0.524	1.04 ± 0.35	1.000	1.03 ± 0.36	1.000
BCVA	0.34 ± 0.09	0.31 ± 0.11	1.000	0.32 ± 0.13	1.000	0.36 ± 0.14	1.000	0.34 ± 0.13	1.000
Sphere, D	−3.86 ± 2.79	−3.46 ± 1.93	1.000	−3.58 ± 2.17	1.000	−3.63 ± 2.35	1.000	−3.61 ± 2.33	1.000
Cylinder, D	−3.48 ± 1.67	−2.74 ± 1.36	0.178	−2.82 ± 1.42	0.205	−3.04 ± 1.19	0.984	−2.98 ± 1.17	0.654
SE, D	−5.60 ± 2.98	−4,83 ± 2.01	0.619	−4.99 ± 2.29	0.629	−5.15 ± 2.48	1.000	−5.10 ± 2.48	1.000
K1, D	52.25 ± 4.98	52.00 ± 4.93	0.389	52.20 ± 5.18	1.000	52.39 ± 5.40	1.000	52.36 ± 5.40	1.000
K2, D	56.87 ± 4.56	56.20 ± 4.82	0.022	56.21 ± 4.90	0.036	56.55 ± 5.16	1.000	56.50 ± 5.17	1.000
Kmax, D	63.48 ± 6.31	62.45 ± 6.86	0.027	62.44 ± 6.80	0.179	62.59 ± 7.59	1.000	62.59 ± 7.56	1.000
Minimal thickness, μm	409.9 ± 29.7	390.4 ± 32.1	<0.001	404.3 ± 28.5	0.085	405.5 ± 26.9	0.105	405.0 ± 27.4	0.067
EC, cells/mm2	2668 ± 220.0	2642 ± 177.6	1.000	2641 ± 188.7	1.000	2644 ± 192.2	1.000	2644 ± 187.1	1.000
IOP, mm Hg	13.42 ± 2.03	14.00 ± 2.42	1.000	13.49 ± 1.64	1.000	13.39 ± 1.92	1.000	13.45 ± 1.88	1.000

UCVA uncorrected visual acuity, BCVA best corrected visual acuity, SE spherical equivalent, EC endothelial cell, IOP intraocular ocular pressure.