Cross-linking: stopping the cone getting worse
It strengthens the cornea. It doesn’t undo the change that’s already there.
How it works
Part 05 · 01Riboflavin drops
Vitamin B2 drops soak into the cornea.
UV light
A controlled dose of ultraviolet light activates the riboflavin.
Stronger cornea
New bonds form between collagen fibres, stiffening the cornea.
What it does
Aims to stop the cornea getting worse. It is the standard treatment for progressing keratoconus.
What it doesn’t do
It doesn’t restore lost vision. Most people still need glasses or contact lenses afterwards.
Who it’s for
Part 05 · 02Almost every teenager is referred for cross-linking at diagnosis. Progression risk at this age is so high that waiting to document it can cost vision.
Corneas with documented progression
For adults, we refer when our monitoring shows the cornea is changing.
Teenagers, at diagnosis
We don’t wait for proof of progression in young patients.
Performed by eye specialists
Cross-linking is done by ophthalmologists. Referral is the standard recommendation, and we arrange it.
We stay involved
We keep monitoring, and manage your vision correction before and after.
Two ways it’s done
Part 05 · 03Epi-off
The thin surface layer is gently removed so the riboflavin can soak in. It has the strongest evidence for halting progression, but recovery is slower and more uncomfortable.
Epi-on
The surface layer is left in place. Recovery is quicker and more comfortable, but in studies it has generally been less effective at stopping progression, although newer methods are narrowing the gap.
Your eye specialist chooses the approach based on your cornea, including its thickness, and will explain the options, risks and costs for you.
What recovery looks like
Part 05 · 04On the day
A day procedure of about an hour, with numbing drops. After epi-off treatment a bandage contact lens is placed.
First few days
Discomfort, light sensitivity and watering while the surface heals, usually over three to five days. The bandage lens comes out once it has.
First weeks
Vision is often hazy and fluctuates. Most people take about a week off school or work.
Months 1–6+
The cornea keeps settling. Topography and prescription can shift during this time.
Like any procedure, cross-linking carries small risks, including infection, delayed healing and corneal haze, which your specialist will discuss.
Back into contact lenses
Part 05 · 05Rigid and scleral lens wear usually restarts around four to six weeks after cross-linking, once the surface has healed and your eye specialist is happy.
Because the cornea keeps changing for several months, lenses are often refitted or fine-tuned during this time. We keep monitoring afterwards to confirm the cornea has stabilised.
Key takeaways
Part 05- 01Cross-linking strengthens the cornea to stop progression
- 02It doesn’t reverse the cone; most people still need glasses or lenses
- 03Teens are referred at diagnosis; adults when progression is documented
Book a progression check.
Not sure if your cornea is changing? We’ll measure it, and arrange referral if needed.
General health information only, not personal advice. Everyone’s eyes are different. An optometrist or doctor should examine you before any treatment is decided.