Corneal Collagen Cross-Linking for Keratoconus: Systematic Review

Table 1

Characteristics of included trials evaluating corneal collagen cross-linking.

Study (year)	Country	Number of treated eyes	Mean age (years)	Mean baseline (diopters)	Control design	Follow-up (months)
Greenstein [16] (2011)	United States	49	Not available	60.4	Contralateral eye	12
O’Brart [17] (2011)	United Kingdom	22	29.6	53.9	Contralateral eye	18
Wittig-Silva [18] (2014)	Australia	46	25.7	52.87	Different patients	36
Lang [19] (2015)	Germany	15	29.5	47.3	Different patients	36
Seyedian [20] (2015)	Iran	26	25.6	49.43	Contralateral eye	12

First author.