EVO ICL Surgery: Who Qualifies, What the Procedure Involves and What Drives the Cost

The EVO ICL is a thin, flexible lens implanted inside the eye, between the iris and your natural lens, that corrects nearsightedness without removing any corneal tissue. The FDA approved it in 2022 for adults 21 to 45 with moderate to very high nearsightedness, including a version for astigmatism. It can be removed, it has little effect on dry eye, and results are strong, but it is surgery inside the eye, it needs ongoing checkups, and it typically costs about twice as much as LASIK.

What the EVO ICL is

An implantable collamer lens (ICL) is a phakic intraocular lens, which means a lens added to the eye while you keep your own natural lens. It is made of collamer, a soft material that blends a polymer with a small amount of collagen, and it sits just behind the iris, the colored part of the eye, where it works much like a contact lens that stays inside the eye.

The American Academy of Ophthalmology (AAO) notes that ophthalmologists have been implanting ICLs since the 1990s, and that STAAR Surgical’s EVO lens is the only FDA-approved ICL in the U.S. today. The FDA approved the original Visian ICL in 2005 and the current EVO version in March 2022.

The EVO’s main design change is a tiny opening in the center of the lens, about a third of a millimeter across, that lets fluid flow through it naturally. With older ICLs, surgeons made small laser openings in the iris beforehand to prevent pressure spikes. The central port makes that extra step unnecessary, and a review of the published studies found lower rates of a type of cataract (anterior subcapsular) and of pupillary block, a blockage of fluid flow that can raise eye pressure, than with earlier models. The review’s author consults for the manufacturer, among other companies.

Who qualifies

The FDA’s March 2022 approval sets these limits for the EVO ICL and its toric version, which also corrects astigmatism:

Within those limits, the AAO says ICLs are increasingly chosen by people with moderate to high nearsightedness or astigmatism, especially those with thin corneas or chronic dry eye, and by people with irregular corneas who may not be candidates for LASIK or SMILE.

Before surgery, your surgeon will also check your eye pressure, corneal thickness, the angle where fluid drains from the eye and your endothelial cell count (the cells on the inner surface of the cornea that keep it clear, which must meet an age-based minimum). A dilated exam of the retina looks for tears or other weak spots that need attention first. A front chamber that is too shallow or an endothelial cell count below the minimum rules an ICL out.

The ICL is approved for people up to 45. Past that age you’re outside the approved range, and presbyopia, the age-related loss of close-up focus that usually starts in the 40s, is setting in, so refractive lens exchange becomes the lens-based option to ask about; see refractive lens exchange (RLE).

Sizing: why measurements matter

An ICL has to fit the space behind the iris. The gap between the ICL and your natural lens is called the vault, and a larger lens sits higher. EyeWiki explains why the vault matters: too low, and the lens sits close enough to your natural lens to raise the risk of a cataract; too high, and it can crowd the eye’s drainage angle and cause pressure problems.

Surgeons size the lens with the manufacturer’s charts, using the width of the eye and the depth of the front chamber, and some also measure the space behind the iris directly with ultrasound. Your surgeon checks the vault within a few hours of surgery and again the next day. Occasionally the vault isn’t right or a toric lens rotates, and the lens has to be repositioned or exchanged.

The surgery

ICL surgery is an outpatient procedure, often done in an office-based surgery center, and it usually takes about 30 minutes. Here is what typically happens:

1. Dilation and numbing. Your pupil is dilated and the eye numbed, usually with drops and sometimes with an injection. The AAO notes that local or general anesthesia may be used, so ask your surgeon which to expect.
2. A small incision. The surgeon makes an incision of about 3 millimeters at the edge of the cornea.
3. Lens placement. The folded lens is injected into the eye, unfolds, and is tucked into place behind the iris.
4. Checks. Eye pressure and the vault are checked within a few hours.

EyeWiki notes that operating on both eyes the same day is common and accepted practice in the U.S., although some surgeons prefer separate days.

Recovery and follow-up

The AAO says vision recovery after an ICL is typically rapid, similar to LASIK. You’ll use antibiotic drops for about a week and steroid drops that are tapered over roughly 2 to 4 weeks, and you’ll have a check the next day.

What sets an ICL apart is the long-term follow-up. Because the lens sits inside the eye for decades, plan on periodic exams that check eye pressure, the lens position and vault, your natural lens and your endothelial cell count. Keep every appointment, and call your surgeon promptly about eye pain, redness or a sudden change in vision.

Results

A 2025 meta-analysis of 27 prospective studies (2,204 nearsighted eyes, followed for about 14 months on average) of ICLs with a central port found:

• 80% of eyes saw 20/20 or better without glasses;
• 87% were within half a diopter of the intended prescription;
• eye pressure stayed stable after surgery; and
• endothelial cell counts fell slightly, by an amount the authors judged clinically acceptable, with complications infrequent and no vision-threatening events reported.

The AAO adds that ICLs are associated with less dry eye than laser procedures, because no corneal nerves are cut, and that the ICL can treat higher levels of nearsightedness than other refractive surgeries.

Risks

The AAO lists these risks:

• Raised eye pressure after surgery, usually temporary and treatable with drops.
• Cataract. A small risk, which the AAO puts at about 2%, of a cataract developing earlier within 5 to 14 years in patients over 40. The EVO’s central port has reduced cataract rates compared with earlier models.
• Infection or inflammation, a very low risk that is reduced further by using the prescribed drops.
• Lens shifting, very uncommon, and mainly a concern with toric lenses for significant astigmatism.
• Retinal detachment, a very low risk; highly nearsighted eyes already carry a higher baseline risk.
• Glare, blurred vision and loss of endothelial cells.

In the earlier FDA trial of the original ICL, complications were more common in eyes with the highest prescriptions, so it’s worth asking your surgeon how your prescription affects your own risk.

Reversibility

The AAO describes the ICL as the only fully reversible refractive surgery: the lens can be removed or replaced if your needs change or better options appear. Laser procedures such as LASIK, SMILE and PRK permanently reshape the cornea.

What drives the cost of an ICL

The AAO says an ICL typically costs about twice as much as LASIK and more than PRK or SMILE. The higher price reflects the custom lens and the surgical fees, and it varies with the surgeon’s experience and your location. That rule of thumb gives you a quick way to sanity-check a quote: look up LASIK prices in your area on LASIK cost by state and city, then compare.

When you compare ICL quotes, check:

• Per eye or both eyes, and whether the lens, surgeon fee and facility fee are all included.
• Sizing and measurements, and whether they’re part of the consultation fee or billed separately.
• Follow-up visits, including how long routine checkups are covered.
• Repositioning or exchange, and what happens to the price if the lens has to be moved or swapped.
• The toric lens, if you have astigmatism, and whether it changes the price.

The AAO notes that refractive procedures like the ICL are considered elective and aren’t covered by insurance. IRS Publication 502 counts eye surgery to correct defective vision as a medical expense, which is why HSA and FSA funds can generally be used; confirm with your plan. See does insurance cover LASIK? and LASIK financing and payment plans.

Finding an ICL surgeon

Fewer practices offer ICLs than LASIK; in LASIK Score’s directory, only a minority of centers list them. Use the LASIK center directory to find practices near you, check each center’s listed procedures, and confirm with the practice. Look for a surgeon who performs ICLs regularly and also offers laser procedures, so the recommendation isn’t limited by what the practice offers. How to choose a LASIK surgeon has a checklist that applies here too.

If you’re weighing an ICL against laser surgery, LASIK vs. ICL compares them side by side.

Questions to ask your surgeon

• Am I within the FDA-approved range, and would my prescription be fully corrected or only reduced?
• What are my anterior chamber depth and endothelial cell count, and how comfortably do they meet the requirements?
• How will you size the lens, and what happens if the vault isn’t right?
• Would you operate on both eyes the same day?
• How many ICLs have you implanted, and how often have you needed to reposition or exchange one?
• What follow-up schedule do you recommend, and what does the quote include?

Bottom line

The EVO ICL is often a strong option for adults 21 to 45 with high nearsightedness, thin or irregular corneas, or significant dry eye, and the AAO describes it as the only refractive surgery that can be fully reversed. In exchange you accept surgery inside the eye, careful sizing, years of follow-up and a price around twice that of LASIK. If your prescription and corneas suit laser surgery, compare both before you decide.