---
title: "What is corneal cross-linking?"
description: "Corneal cross-linking (CXL) is a minimally invasive procedure designed to strengthen the cornea and halt the progression of keratoconus and related ectatic disorders. It works by increasing natural 'cross-links' between collagen fibres in the cornea. ## How the Procedure Works…"
url: "https://bluefinvision.com/knowledge-base/topics/conditions-diseases/what-is-corneal-cross-linking/"
updated: "2025-12-11"
category: "Conditions & Diseases"
---

# What is corneal cross-linking?

Corneal cross-linking (CXL) is a minimally invasive procedure designed to strengthen the cornea and halt the progression of keratoconus and related ectatic disorders. It works by increasing natural 'cross-links' between collagen fibres in the cornea.

## How the Procedure Works

After numbing drops, vitamin B2 (riboflavin) drops are applied to the cornea and activated with controlled ultraviolet-A light. This reaction forms additional bonds between collagen fibres, stiffening the corneal tissue.

- Usually performed as a day-case procedure
- Both eyes may be treated on the same day or separately
- Vision is often blurred for a period while the surface heals

## Benefits of Cross-Linking

CXL is the only treatment proven to stop keratoconus from getting worse in most patients, greatly reducing the risk of needing a corneal transplant. Some patients also notice improved vision once the cornea stabilises.

## Further Information

Blue Fin Vision® explains CXL in detail in the article [what is corneal cross-linking (CXL) for keratoconus?](https://bluefinvision.com/blog/what-is-corneal-cross-linking-cxl-for-keratoconus/).