Review Article
Corneal Collagen Cross-Linking for Keratoconus: Systematic Review
Figure 3
Change in the thinnest corneal thickness between CXL and control groups. No significant heterogeneity was observed as indicated by an I2 of 35%. There was no significant difference between groups (p = 0.50). CXL: collagen cross-linking, SD: standard deviation, and CI: confidence interval.