Strengthen Your Eyesight With Corneal Crosslinking Surgery Corneal cross-linking surgery is a surgical procedure that helps to improve the stability of the cornea. The cornea is the clear, innermost layer of the eye, and it plays an important role in focusing light. However, the cornea can be damaged by disease or injury, causing it to become weak and unstable. Corneal cross-linking surgery helps to reinforce the cornea by creating new cross-links between the collagen fibers in the cornea. This helps to increase the strength and stability of the cornea, making it less susceptible to further damage.