What does CXL stand for?

CXL is the standard abbreviation for corneal cross-linking — sometimes written CCL or CXL, and occasionally as “collagen cross-linking”, which describes what it does to the cornea’s collagen fibres. All refer to the same procedure: riboflavin drops plus controlled ultraviolet light, used to strengthen the cornea and halt keratoconus progression.

What is corneal cross-linking?

Corneal cross-linking (CXL) is a procedure that strengthens the cornea to stop keratoconus getting worse. Riboflavin — vitamin B2 — is applied to the cornea and then activated with controlled ultraviolet light, which forms new bonds between the collagen fibres in the corneal tissue. A stiffer cornea resists the thinning and bulging that drives keratoconus forward. The FDA approved cross-linking for progressive keratoconus and for post-refractive-surgery ectasia in 2016.

Does corneal cross-linking improve vision?

Generally no, and this is the single most important thing to understand about it. Cross-linking is a stabilising procedure, not a corrective one. It is designed to stop your cornea getting worse — not to make the cone go away. Your cornea stays irregular after treatment, so the blurring, ghosting and haloing that irregularity causes are still there. Correcting that is a separate job, and for most people it means a specialty contact lens.

Do you perform cross-linking at Michigan Contact Lens?

No. Dr. Shira Kresch, OD, MS, FAAO is an optometrist specialising in specialty contact lenses, and cross-linking is a surgical procedure performed by a corneal surgeon. What we do is the part either side of it: assess whether your keratoconus is actually progressing and therefore whether you need CXL at all, refer you to a corneal surgeon we trust, and then fit the lenses that give you usable vision afterwards. Many patients come to us for that last part having had cross-linking done elsewhere.

Who needs corneal cross-linking?

The deciding factor is documented progression, not the diagnosis alone. Keratoconus that is measurably steepening or thinning over time is what cross-linking is for; keratoconus that has been stable for years generally is not. Because progression is fastest in teenagers and young adults, younger patients are assessed more urgently and more often. Establishing whether you are progressing takes repeated corneal topography over months — a single scan cannot show a trend.

What is the difference between epi-on and epi-off cross-linking?

It refers to the corneal epithelium, the surface cell layer. In epi-off — the original Dresden protocol and the approach with the longest evidence base — the epithelium is removed so riboflavin penetrates more readily. Recovery is more uncomfortable and takes longer because that surface has to heal. In epi-on the epithelium is left intact, which is gentler and heals faster, but riboflavin penetration is harder to achieve. Which is appropriate is a decision for the surgeon based on your corneal thickness and how fast the disease is moving.

How long does recovery from cross-linking take?

The surface discomfort is worst in the first few days while the epithelium heals, and a bandage lens is usually placed to help. Light sensitivity and blurred vision are expected during that period. Vision then continues to fluctuate for weeks to months as the cornea settles, and it is normal for it to be worse than before the procedure for a while. Your surgeon will say when the cornea is stable enough to fit lenses on — typically after a few months.

Is cross-linking covered by insurance?

It depends entirely on your plan and is handled by whoever performs the procedure, not by us. It is a medical rather than a vision-plan matter, so it runs through your medical benefits. For the lens fitting afterwards, Michigan Contact Lens is out-of-network by choice and provides a detailed superbill you can submit for out-of-network reimbursement.

Can I wear contact lenses after cross-linking?

Yes, and most people need to. Because cross-linking stabilises the cornea without smoothing it, a specialty lens is usually what actually restores your vision afterwards. The timing is set by your surgeon once the cornea has settled — commonly a few months. Your prescription will often have changed, so a refit rather than your old lenses is the starting point.

Corneal Cross-Linking (CXL) For Keratoconus

Corneal cross-linking stops keratoconus getting worse. It does not make your vision better.

Both halves of that sentence matter, and the second half is the one most people are not told clearly. If you have been referred for cross-linking, or had it and are wondering why your vision is still blurry, this page is written for you.

We do not perform cross-linking. Dr. Shira Kresch, OD, MS, FAAO is an optometrist specialising in specialty contact lenses; CXL is a surgical procedure done by a corneal surgeon. What this practice does is the part either side of it — working out whether you actually need it, referring you to a surgeon we trust, and fitting the lenses that give you usable vision afterwards.

What cross-linking actually does

Keratoconus is a structural problem. The collagen fibres that give the cornea its strength are not adequately bonded to one another, so the tissue is too weak to hold its shape. Under normal eye pressure it thins and bulges into a cone.

Cross-linking addresses the bonding directly. Riboflavin — vitamin B2 — is applied to the cornea, and then activated with controlled ultraviolet light. That reaction forms new cross-links between the collagen fibres. A cornea with more cross-links is stiffer, and a stiffer cornea resists further deformation.

The FDA approved cross-linking for progressive keratoconus and for post-refractive-surgery ectasia in 2016. It is the only treatment that addresses the underlying weakness rather than compensating for its effects.

What it does not do

This is where most of the disappointment around CXL comes from, and it is entirely avoidable with a clear explanation up front.

It does not reverse the cone. Cross-linking stiffens the cornea in the shape it is already in. It is a stabilising procedure, not a reshaping one. Whatever irregularity your cornea has when you go in, it broadly still has afterwards.

It does not restore vision. Because the cornea stays irregular, the blurring, ghosting, doubling and haloing caused by that irregularity are still there. Some patients see a modest improvement as the cornea flattens slightly over the following year; others see no change; plenty see slightly worse vision for months while the cornea settles. None of that means the procedure failed. Halting progression was the goal, and halting progression is what it did.

It does not remove scarring, and it is not usually offered once significant scarring is present.

It does not mean you are finished. Cross-linking and vision correction are two separate jobs. The first protects your cornea’s future; the second gives you something to see with today. For most people that second job means a specialty lens — scleral, hybrid or rigid — because glasses and soft lenses cannot correct an irregular surface.

If you have had cross-linking and your vision is still poor, that is the expected outcome, not a complication. We wrote a separate page about exactly that: vision after cross-linking.

Who needs it, and who does not

The deciding factor is documented progression, not simply having keratoconus.

Cross-linking is for keratoconus that is measurably getting worse — a cornea steepening or thinning over successive scans. Keratoconus that has been stable for years generally does not need it, because there is nothing to halt.

Establishing which of those you are takes repeated corneal topography over months. A single scan shows you a shape; it cannot show you a trend. This is a large part of what we do before any referral, and it is why a decision about CXL is rarely appropriate at a first visit — see how progression is actually measured.

Some things move the assessment:

Age. Progression is typically fastest in teenagers and young adults, so younger patients are monitored more closely and referred sooner. There is no fixed cut-off, and adults with documented progression are treated too.
Rate of change. A prescription that has shifted noticeably in a year, or scans showing clear steepening, argues for acting rather than watching.
Corneal thickness. The cornea has to be thick enough for the procedure to be done safely. Very advanced, very thin corneas may not be candidates.
Scarring. Significant central scarring changes the conversation, often towards transplant rather than cross-linking.
Eye rubbing. Worth mentioning because it is the one risk factor you control — see keratoconus and eye rubbing.

Epi-off, epi-on, and the protocol names

You will encounter several names, and they describe variations on one procedure.

Epi-off (the Dresden protocol) removes the corneal epithelium — the surface cell layer — so riboflavin penetrates the tissue more readily. This is the original approach and the one with the longest evidence base. Because that surface has to heal, recovery is more uncomfortable and slower.

Epi-on (transepithelial) leaves the epithelium intact. Gentler, faster healing, less discomfort — but getting adequate riboflavin penetration through an intact surface is harder, which is the trade-off.

Which is appropriate depends on your corneal thickness and how quickly the disease is moving, and it is the surgeon’s call.

Protocol and system names you may hear: iLink, the FDA-approved epi-off system; KXL, a delivery platform; C3-R and the Holcomb C3-R protocol, names associated with particular epi-on approaches. Accelerated protocols shorten UV exposure by raising the intensity. The distinctions matter clinically, and they are questions for the surgeon performing your procedure rather than reasons to choose one clinic over another.

The procedure, and the recovery

The appointment usually runs an hour to ninety minutes, most of it spent letting the riboflavin soak in rather than under the light. Anaesthetic drops mean it is not painful at the time.

Broadly: numbing drops, epithelium prepared if the protocol is epi-off, riboflavin applied over a period, controlled UV exposure, then a bandage contact lens placed to protect the healing surface.

Recovery is front-loaded. The first few days are the uncomfortable part while the epithelium heals — expect light sensitivity, watering, a gritty foreign-body sensation and blurred vision. Drops are prescribed, and the bandage lens comes out once the surface has closed.

Then vision fluctuates for weeks to months. It is common for vision to be worse than before the procedure for a while. It settles gradually, and your surgeon will tell you when the cornea is stable enough to be fitted with lenses — commonly a few months out.

What happens afterwards, and where we come in

Once your cornea is stable, the question becomes what you can actually see with — and that is the part of your care we handle.

Your prescription will often have changed, so starting from your old lenses is rarely right. If you wore rigid or scleral lenses before, they will likely need refitting to the new corneal shape. If you have never worn specialty lenses, this is usually the point at which they become the obvious answer, because cross-linking has protected the cornea without smoothing it.

We map the cornea, design a lens to that map, and fit it — see vision after cross-linking for what that process looks like specifically after CXL, and the scleral lens fitting process more generally.

“Cross-linking near me” — an honest answer

If you are searching for cross-linking near Southfield, Detroit or anywhere in Metro Detroit, here is the straight version.

We are not the people who will perform it. What we can do, usually more usefully at this stage, is tell you whether you need it. A significant number of patients arrive convinced they need cross-linking urgently and turn out to be stable, and some arrive thinking they have time when their scans say otherwise. That assessment is a specialty optometric job, and it is free here.

If you do need it, we refer you to a corneal surgeon we work with regularly and stay involved through the process — then fit the lenses afterwards. If you have already had cross-linking elsewhere and nobody has sorted out your vision since, that is squarely what we do.

What it costs

Cross-linking itself is billed by whoever performs it, so we cannot quote it — and coverage depends on your medical plan rather than your vision plan, since it is a medical procedure.

For the lens fitting afterwards: Michigan Contact Lens is out-of-network by choice, which means the clinical decision is Dr. Kresch’s and yours rather than a plan’s. We provide a detailed superbill you can submit for out-of-network reimbursement, and we accept HSA and FSA funds, CareCredit and in-house payment plans. See Insurance & Payment Options and what drives the cost of scleral lenses.

If you are deciding right now

Three questions worth getting answered before anything else:

Is my keratoconus actually progressing? Without repeated topography over time, nobody can tell you. This determines whether you need CXL at all.
What will my vision be afterwards? Ask plainly. The honest answer is usually “about the same, and then we correct it with a lens” — and knowing that in advance prevents a great deal of disappointment.
Who is fitting my lenses after? This is the question that most often goes unasked. Cross-linking protects your cornea; a lens is what lets you see. Arranging the second part before the first happens makes the whole process smoother.

Dr. Shira Kresch, OD, MS, FAAO sees keratoconus patients at Michigan Contact Lens in Southfield, serving Birmingham, Royal Oak, Troy, Farmington Hills, West Bloomfield, Novi, Oak Park, Huntington Woods, Rochester Hills and Detroit. Meet Dr. Kresch.

No referral needed, and your initial consultation is complimentary — corneal mapping, an honest read on whether you are progressing, and a clear plan either way.

Book a Free Consultation or call (248) 545-2800

Corneal Cross-Linking Questions

What does CXL stand for?: CXL is the standard abbreviation for corneal cross-linking — sometimes written CCL or CXL, and occasionally as “collagen cross-linking”, which describes what it does to the cornea’s collagen fibres. All refer to the same procedure: riboflavin drops plus controlled ultraviolet light, used to strengthen the cornea and halt keratoconus progression.
What is corneal cross-linking?: Corneal cross-linking (CXL) is a procedure that strengthens the cornea to stop keratoconus getting worse. Riboflavin — vitamin B2 — is applied to the cornea and then activated with controlled ultraviolet light, which forms new bonds between the collagen fibres in the corneal tissue. A stiffer cornea resists the thinning and bulging that drives keratoconus forward. The FDA approved cross-linking for progressive keratoconus and for post-refractive-surgery ectasia in 2016.
Does corneal cross-linking improve vision?: Generally no, and this is the single most important thing to understand about it. Cross-linking is a stabilising procedure, not a corrective one. It is designed to stop your cornea getting worse — not to make the cone go away. Your cornea stays irregular after treatment, so the blurring, ghosting and haloing that irregularity causes are still there. Correcting that is a separate job, and for most people it means a specialty contact lens.
Do you perform cross-linking at Michigan Contact Lens?: No. Dr. Shira Kresch, OD, MS, FAAO is an optometrist specialising in specialty contact lenses, and cross-linking is a surgical procedure performed by a corneal surgeon. What we do is the part either side of it: assess whether your keratoconus is actually progressing and therefore whether you need CXL at all, refer you to a corneal surgeon we trust, and then fit the lenses that give you usable vision afterwards. Many patients come to us for that last part having had cross-linking done elsewhere.
Who needs corneal cross-linking?: The deciding factor is documented progression, not the diagnosis alone. Keratoconus that is measurably steepening or thinning over time is what cross-linking is for; keratoconus that has been stable for years generally is not. Because progression is fastest in teenagers and young adults, younger patients are assessed more urgently and more often. Establishing whether you are progressing takes repeated corneal topography over months — a single scan cannot show a trend.
What is the difference between epi-on and epi-off cross-linking?: It refers to the corneal epithelium, the surface cell layer. In epi-off — the original Dresden protocol and the approach with the longest evidence base — the epithelium is removed so riboflavin penetrates more readily. Recovery is more uncomfortable and takes longer because that surface has to heal. In epi-on the epithelium is left intact, which is gentler and heals faster, but riboflavin penetration is harder to achieve. Which is appropriate is a decision for the surgeon based on your corneal thickness and how fast the disease is moving.
How long does recovery from cross-linking take?: The surface discomfort is worst in the first few days while the epithelium heals, and a bandage lens is usually placed to help. Light sensitivity and blurred vision are expected during that period. Vision then continues to fluctuate for weeks to months as the cornea settles, and it is normal for it to be worse than before the procedure for a while. Your surgeon will say when the cornea is stable enough to fit lenses on — typically after a few months.
Is cross-linking covered by insurance?: It depends entirely on your plan and is handled by whoever performs the procedure, not by us. It is a medical rather than a vision-plan matter, so it runs through your medical benefits. For the lens fitting afterwards, Michigan Contact Lens is out-of-network by choice and provides a detailed superbill you can submit for out-of-network reimbursement.
Can I wear contact lenses after cross-linking?: Yes, and most people need to. Because cross-linking stabilises the cornea without smoothing it, a specialty lens is usually what actually restores your vision afterwards. The timing is set by your surgeon once the cornea has settled — commonly a few months. Your prescription will often have changed, so a refit rather than your old lenses is the starting point.

Corneal Cross-Linking (CXL) for Keratoconus