The EVO ICL is designed to be a permanent implant with no built-in expiration date. The lens material does not degrade inside the eye, and most patients keep their lens for decades without needing a replacement. That said, “permanent” comes with some practical caveats worth understanding, especially around age-related vision changes and the small chance you might need the lens removed.
The Lens Itself Does Not Wear Out
The EVO ICL is made from Collamer, a blend of a soft polymer and porcine collagen that is highly compatible with the body’s own tissue. Unlike a contact lens that dries out or accumulates deposits, this implant sits inside the eye between the iris and your natural lens, bathed in fluid. There is no friction, no exposure to air, and no mechanical stress that would cause it to break down over time. Clinical studies have tracked patients for years without finding evidence that the lens material deteriorates.
A three-year FDA multicenter study confirmed excellent long-term safety and effectiveness, and separate five-year follow-up data from Japanese researchers showed stable eye pressure throughout that period. The lens does not need to be replaced on a schedule the way a car part might. Once it’s in, it can stay in for life if everything goes well.
How Long the Vision Correction Lasts
The vision correction the EVO ICL provides is stable for most people, but your eyes can still change independently of the lens. The two most common reasons your vision might shift after implantation are a change in your underlying prescription (especially if you’re in your early twenties and your eyes haven’t fully stabilized) and the natural onset of presbyopia, the gradual loss of close-up focusing ability that typically begins in your early to mid-forties.
The EVO ICL corrects distance vision and preserves your natural lens, which is the structure responsible for focusing up close. As that natural lens stiffens with age, you will likely need reading glasses at some point, just as you would with LASIK or with no surgery at all. The implant doesn’t prevent or accelerate this process.
In a large U.S. retrospective analysis of over 700 eyes, the overall rate of postoperative adjustments (including lens rotations, exchanges, and laser touch-ups) was 4.8%. Some of those adjustments addressed residual astigmatism, and others fine-tuned the fit of the lens. These are generally minor interventions, not signs that the lens has failed.
Reasons the Lens Might Need to Be Removed
A small percentage of patients do eventually have their EVO ICL taken out. In a study tracking 787 ICL implants, 3.8% were explanted. The breakdown of reasons is informative:
- Incorrect lens sizing accounted for the majority of removals (22 out of 30 cases). This is largely a fitting issue caught relatively early, not a long-term durability problem.
- Cataract development was the reason in 4 cases. Because the ICL sits directly in front of your natural lens, there is a small risk of cataract formation over many years. If a cataract does develop, the ICL is removed at the same time the cataract is treated.
- Other reasons included high residual astigmatism (2 cases), retinal detachment (1 case), and intolerable glare (1 case).
The key point is that the EVO ICL is fully reversible. If it ever needs to come out for any reason, your eye returns to roughly its pre-surgery state because the procedure does not remove or reshape any corneal tissue. This is one of the main advantages the lens has over LASIK: it preserves your options for the future.
What “Permanent” Really Means in Practice
For most recipients, the EVO ICL functions well for 20 years or more. Many patients will eventually need cataract surgery in their sixties or seventies, at which point the ICL is removed and a new intraocular lens replaces the clouded natural lens. So in practical terms, the ICL bridges the gap between when you have it implanted (typically your twenties to forties) and when age-related lens changes require a different solution.
During that span, you can expect clear distance vision without the need for glasses or contacts. You will still need reading glasses once presbyopia sets in, usually around age 45. And you should continue regular eye exams so your doctor can monitor the space between the implant and your natural lens, watch for early cataract changes, and check eye pressure, all of which are straightforward parts of routine care.
The lens does not expire, does not need replacing on a timeline, and does not lose its optical clarity. Your eyes will continue to age around it, but the implant itself is built to last as long as you need it.