Table 6. Systematic review of efficacy of epithelial removal (ER) and transepithelial corneal collagen crosslinking: change in CDVA, cylinder and maximum keratomtery at 12 months.

		LogMAR CDVA change at 1 year	Cylinder (diopters) change at 1 year	Maximum keratometry (Kmax) change at 1 year
Epithelium removal technique
Agrawal V9	2009	−0.09	−1.2	−2.47
Arora R70	2013	−0.12	—	0.4
Asri D69	2011	−0.01	0.07	−0.49
Caporossi A4	2010	−0.30	−0.52	—
Caporossi A68	2012	−0.09	—	−0.72
Ghanem R67	2013	−0.12	0.42	−0.8
Greenstein S64	2012	−0.10	—	−1.60
Grewal D63	2009	−0.02	—	—
Guber I62	2013	−0.04	0.73	−0.16
Hassan Z60	2013	−0.04	−0.78	—
Hashemi H61	2013	−0.11	0.25	−0.16
Hersh P10	2011	−0.14	−0.08	−2.00
Hoyer A59	2009	−0.07	−0.90	−1.35
Kampik D56	2011	−0.09	—	—
Kranitz K11	2012	−0.09	−0.49	−1.68
Kymionis G54	2012	—	—	—
Lamy53	2013	−0.14	—	0.56
Legare52	2013	−0.02	0.2	—
Magli51	2013	0.01	0.11	−1.14
Mazzotta C50	2012	−0.11	—	−0.30
Mencucci R48	2012	—	—	—
O'Brart D47	2013	0.05	−0.02	—
Raiskup-Wolf F44	2008	−0.08	−0.93	−1.43
Raiskup F45	2009	0.05	—	−0.75
Raiskup F5	2011	−0.04	—	−0.7
Rechichi M43	2013	−0.05	0.99	—
Sloot F42	2013	−0.13	—	−1.5
Toprak I40	2013	−0.13	—	−0.84
Vinciguerra P37	2009	−0.14	—	—
Vinciguerra P38	2009	−0.14	−0.26	−6.26
Vinciguerra P39	2010	—	—	−0.73
Vinciguerra P6	2012	−0.58	—	—
Wittig-Silva C35	2014	−0.09	−0.85	−0.72
Transepithelial
Caporossi A72	2013	—	—	0.60
Filippello M29	2012	−0.09	—	—
Koppen C27	2012	−0.04	0.04	1.33
Leccisotti A30	2010	−0.04	—	0.51
Stojanovic A28	2012	−0.12	−1.15	−0.57

— indicates data not provided in published article.