ICL EVO / ECHO

What is EVO ICL (and ECHO ICL)?

EVO ICL is a vision correction procedure that places a soft, biocompatible lens inside the eye to correct nearsightedness, rather than reshaping the cornea like laser surgery. The lens sits gently behind the iris and in front of the eye’s natural lens, where it stays out of sight and out of feeling. In Korea, the same lens family is sometimes referred to as ECHO ICL, an implantable collamer lens used for higher prescriptions. Because no corneal tissue is removed, an ICL can be an option for people with high myopia or thin corneas who may not be suitable for LASIK or SMILE. A surgeon at Smile Eye Clinic Korea confirms eligibility at an in-person exam in Seoul.

Who is ICL for? (candidacy)

ICL is most often considered when laser surgery is not ideal. You may be a candidate if you have high myopia, a thin or irregular cornea, dry eyes that could worsen after laser treatment, or a prescription that sits outside the comfortable range for corneal procedures.

• Adults whose prescription has been stable, typically reviewed from the mid-20s onward
• People with thin corneas who want a tissue-preserving alternative
• Patients told their prescription is “too high” for LASIK
• Those who prefer a procedure that can be reversed if needed

Suitability also depends on the internal space of your eye and the health of the cornea’s inner cell layer. These factors can only be measured directly, so candidacy is always confirmed after an in-person exam, not online or before arrival.

What prescription is too high for LASIK?

As a general guide, very high degrees of nearsightedness or thin corneas can place a prescription beyond the safe range for LASIK, because laser correction depends on having enough corneal tissue to reshape. ICL works differently and can address higher prescriptions, but the exact threshold is individual and confirmed only at an in-person exam.

How ICL works, step by step

The process is methodical and centered on careful measurement. Here is what to expect:

• In-person examination in Seoul: detailed scans measure the cornea, the internal dimensions of the eye, and the inner cell layer to confirm eligibility and select the correct lens size.
• Lens selection and ordering: each lens is matched to your individual measurements, so a short waiting period may apply while the lens is prepared.
• The procedure: performed on an outpatient basis with numbing drops. The surgeon makes a tiny opening, gently inserts the folded lens, and positions it behind the iris. It typically takes only minutes per eye.
• Recovery and follow-up: a short rest, then follow-up checks to confirm the lens is sitting well and your eye is healing as expected.

The technology

The lens is made from collamer, a soft, flexible material designed to be well tolerated inside the eye. Modern EVO lenses include a small central port that allows natural fluid to flow, supporting healthy pressure inside the eye. At Smile Eye Clinic Korea, planning is supported by ZEISS diagnostic systems for precise measurement of the eye’s structures, which is essential for choosing the right lens size and position. Our four specialist ophthalmic surgeons focus on this kind of measurement-driven planning, because accurate sizing is one of the most important factors in a comfortable, stable result.

Recovery timeline

Many people notice clearer vision soon after the procedure, with vision continuing to settle over the following days. Mild light sensitivity, watering, or a scratchy feeling can occur early on and usually eases quickly.

• First 24 hours: rest your eyes; vision often begins to clear
• First week: use prescribed drops, avoid rubbing your eyes, and follow guidance on screens and washing
• First weeks: gradual return to normal activities as confirmed by your surgeon

Because ICL does not remove corneal tissue, some patients find early comfort and dryness differ from laser recovery. Your surgeon will give a recovery plan suited to your eyes and travel timeline.

Risks and considerations

ICL is a well-established procedure, but like any eye surgery it carries considerations worth understanding. These can include temporary glare or halos around lights at night, changes in eye pressure, and the small possibility that the lens may need to be repositioned or, rarely, exchanged. Correct lens sizing reduces these risks, which is why thorough in-person measurement matters. Long-term monitoring of eye pressure and the cornea’s inner cell layer is part of responsible aftercare. A surgeon will discuss the neutral pros and cons for your specific eyes so you can make an informed decision.

Is ICL reversible?

One distinct feature of ICL is that it does not permanently alter the cornea. The lens is added inside the eye rather than removing tissue, so in principle it can be removed or exchanged by a surgeon if your needs change in the future, for example if your prescription shifts significantly. This reversibility is a key reason many patients with high myopia consider ICL over corneal laser surgery. Whether removal or exchange is appropriate in any individual case is a clinical decision confirmed in person.

ICL vs LASIK for high myopia

Both procedures aim to reduce dependence on glasses, but they suit different eyes. LASIK reshapes the cornea and works well within a certain range of prescriptions and corneal thickness. ICL adds a lens inside the eye, preserves corneal tissue, and can address higher prescriptions or thinner corneas. For high myopia specifically, ICL is often discussed because it does not depend on removing corneal tissue and is reversible. Neither is universally better; the right choice depends on your prescription, corneal thickness, eye anatomy, and lifestyle, all assessed at an in-person exam.

What is the best age for ICL surgery?

ICL is generally considered for adults whose prescription has been stable, often from the mid-20s onward, since stability matters more than a single ideal age. Younger eyes may still be changing, while older patients may have other lens considerations. The most suitable timing is confirmed by a surgeon at an in-person exam.

Why have ICL in Korea

Korea has become a recognized destination for vision correction, with clinics that focus on advanced diagnostics and high-volume surgical experience. Smile Eye Clinic Korea, located in Gangnam, Seoul, welcomes international patients, including visitors from Mongolia and English-speaking patients worldwide. Care is delivered by four specialist ophthalmic surgeons and supported by ZEISS diagnostic systems, with English-language guidance through the examination, procedure, and follow-up. Because all assessment is done in person in Seoul, your treatment plan is based on direct measurement of your eyes rather than estimates made from afar.

Cost

The cost of ICL depends on factors such as the lens type, your prescription, and whether one or both eyes are treated. ICL generally involves a higher price range than laser procedures because each lens is custom-matched to your eye. Smile Eye Clinic Korea provides clear pricing ranges during your consultation, with the final cost confirmed after your in-person exam, once your measurements and lens requirements are known. There are no discount or promotional claims; the goal is a transparent estimate based on what your eyes actually need.

Frequently asked questions

Can ICL be removed later?

Yes. ICL does not remove corneal tissue, so the lens can be removed or exchanged by a surgeon if your vision needs change over time. This makes it a flexible option for many patients. Whether removal is appropriate in your case is confirmed at an in-person exam in Seoul.

Does the procedure hurt?

Numbing drops are used so the procedure is generally well tolerated, and it usually takes only a few minutes per eye. Some patients notice mild watering or light sensitivity early in recovery. Your surgeon will explain what to expect and provide drops and aftercare guidance.

Can I be assessed before I travel to Korea?

Eligibility for ICL requires precise in-person measurements of your eye, and remote diagnosis is not permitted in Korea. We can share general information and answer questions in advance, but your candidacy and lens selection are confirmed only at an in-person exam in Seoul.

Is ICL better than LASIK?

Neither is universally better; they suit different eyes. LASIK reshapes the cornea, while ICL adds a reversible lens and preserves corneal tissue, which can help patients with high myopia or thin corneas. A surgeon reviews your prescription and eye anatomy in person to recommend the most suitable option for you.

How long does the lens last?

The lens is designed to remain in the eye long-term and is not visible or felt in daily life. It can be removed or exchanged if your clinical needs change. Ongoing follow-up checks help confirm the lens is positioned well and your eye remains healthy over time.