Corneal cross-linking is a treatment that strengthens a thinning cornea, most often in keratoconus, to slow or stop further bulging.
Why cross-linking is offered
In keratoconus, the cornea becomes weaker and more cone shaped, causing worsening blur and distortion.
Cross-linking uses vitamin B2 drops and ultraviolet light to create extra chemical bonds in the corneal collagen, making it stiffer and more stable.
- Best suited to eyes where keratoconus is still progressing rather than already stable
- Aims to preserve vision and reduce the chance of needing a corneal transplant
- Can be combined with specialist contact lenses for clearer focus
- Designed as a one off treatment, though repeat procedures are sometimes considered
What treatment and recovery feel like
During standard cross-linking, the thin surface skin epithelium is gently removed, vitamin drops are applied, and a controlled light is shone on the cornea.
Afterwards the eye often feels sore, gritty, and light sensitive for several days while the surface heals under a bandage contact lens.
- Pain relief, lubricants, and protective sunglasses make the early days easier
- Vision is usually blurred at first and gradually improves over weeks
- Avoid rubbing your eyes, as this can worsen keratoconus progression
- Regular follow up with scans checks stability and guides any further care
