Strengthen that weak cornea, avoid vision loss (Collagen cross-linking procedure, C3-R®) What is the collagen cross-linking procedure? Collagen cross-linking (C3R or CXL) procedure is performed to improve the stiffness of the cornea, which is the transparent layer in front of the eye in certain conditions. The process strengthens the tissue of the cornea by inducing "cross-links" between the internal tissues of a layer of the cornea(stroma), thus reinforcing the structure. This FDA-approved technique is most commonly used as a treatment…