Corneal cross-linking is offered for keratoconus to strengthen the cornea and slow or stop progression. It is most effective when used early, before scarring and thinning become advanced.
When cross-linking is considered
Evidence of recent change is key. Eye care teams review scans and prescriptions over time to judge progression.
- Increasing astigmatism or myopia despite new glasses or lenses
- Topography showing steepening or thinning of the cornea
- Younger patients, who tend to progress faster, are often prioritised
- Generally suitable while the cornea is thick enough for safe treatment
Goals and limitations
Cross-linking aims to stabilise, not usually to improve, vision directly. Many people still need glasses or lenses afterwards.
- Can reduce the chance of needing a corneal transplant later
- Rigid or scleral lenses may fit more reliably once shape stabilises
- Some discomfort and light sensitivity are expected for a few days post-treatment
- Regular follow-up checks confirm the cornea remains stable over the years
