All About Implantable Collamer Lens (ICL) Surgery: Softer than LASIK, Faster than LASEK

Hello. This is BGN Eye Clinic at Jamsil Lotte Tower.

When people visit our clinic these days to learn about vision correction surgery, they no longer just debate between "LASIK vs. LASEK" as they did in the past. With an expanded range of advanced options like SMILE LASIK and Implantable Collamer Lens (ICL) surgery, the primary question has shifted to: "Which procedure is genuinely the best fit for my eyes?"

Today, selecting a procedure based on your specific ocular condition and lifestyle is far more crucial than simply choosing a popular surgery name. To find your ideal solution, a comprehensive evaluation must factor in corneal thickness, dry eye severity, outdoor activity levels, and occupational demands.

For these reasons, a rapidly growing number of patients are turning to EVO+ Aqua ICL surgery, a premium method that inserts a specialized lens inside the eye without reshaping or removing any corneal tissue. Its major advantages include a fast recovery, minimal risk of dry eyes, and the preservation of the eye’s natural structural integrity.

While the concept may sound unfamiliar at first, this procedure is globally proven for its exceptional safety and efficacy. If LASIK or SMILE LASIK can be categorized as "corneal reshaping surgeries," EVO+ ICL is best understood as an "internalized corrective lens."

In my practice, I frequently meet patients who seek clear, objective information rather than harboring vague fears about lens implantation. Common questions include, "Will I feel the lens inside my eye?" or "Is the recovery slower than LASIK?"

In this article, I will address these common questions from a specialist's perspective. We will walk through how EVO+ Aqua ICL corrects vision, what to expect during the procedure and recovery, and who stands to benefit most from this advanced technology.

What is Implantable Collamer Lens (ICL) Surgery?

When patients first hear the phrase "inserting a lens inside the eye," many are understandably startled. The most common reactions are, "Is that really possible?" or "Is it safe?"

In response, I always reassure them: "Yes, it is entirely safe. Our eyes have a natural, designated space built to accommodate this lens. By utilizing that space precisely, we can achieve crystal-clear vision without touching your cornea."

The human eye is broadly structured into four main zones: the cornea, iris, crystalline lens, and retina. ICL surgery involves placing an ultra-thin, specialized lens into the space behind the iris (the colored part of the eye) and in front of the natural crystalline lens. Simply put, it acts as a permanent, internal contact lens.

This lens is crafted from Collamer, a highly biocompatible material. Collamer is a proprietary polymer containing collagen, making its molecular structure remarkably similar to the natural proteins found in the eye. As a result, it triggers virtually no inflammatory response or rejection. It can remain safely inside the eye for over a decade while maintaining its pristine clarity and stability.

Unlike LASIK and LASEK, which are irreversible procedures because they permanently ablate corneal tissue, ICL is fully reversible. The lens can be safely modified, replaced, or removed at any time if necessary. Furthermore, because ICL leaves the cornea completely intact, postoperative dry eye syndrome is practically nonexistent. For this reason, I almost always recommend ICL as the primary option for patients presenting with severe dry eyes.

Core Technology of EVO+ Aqua ICL: The Centra FLOW Structure

The EVO+ Aqua ICL lens features a sophisticated engineering marvel known as the Centra FLOW structure. This is not just a simple aperture; it is a highly precise design crafted to preserve the eye's natural fluid dynamics.

A microscopic hole, measuring 360 micrometers (㎛) in diameter, sits at the exact center of the lens, allowing the natural flow of aqueous humor to circulate seamlessly. Unlike legacy generations of ICL, this advancement completely eliminates the need for a preoperative peripheral iridotomy (making a hole in the iris), significantly shortening the total surgical time and accelerating patient recovery.

Expanded Optical Zone for Sharper Visual Clarity

Additionally, the EVO+ lens boasts a significantly wider optical zone. By stabilizing light refraction all the way to the peripheral edges, it drastically reduces nighttime glare and halo effects. This technological evolution represents a surgery that enhances your vision naturally without disrupting your eye's innate anatomy.

EVO+ Toric ICL: Correcting Myopia and Astigmatism Simultaneously

Astigmatism occurs when an irregularly shaped, oval cornea prevents light rays from focusing on a single point on the retina. While conventional ICLs could only address nearsightedness, the EVO+ Toric Aqua ICL corrects both myopia and astigmatism at the same time. Through precise axis alignment configured down to a single degree, it delivers unparalleled visual sharpness even for patients with high astigmatism.

Comparison: Conventional ICL vs. EVO+ Aqua ICL

Preoperative Diagnostics and Custom Eye Mapping

In lens implantation surgery, ultimate success is determined in the diagnostics room long before entering the operating room. I often emphasize to my patients: "The surgery itself takes only 10 minutes, but the thorough diagnostic testing takes two and a half hours." That is how critical the preparation phase is.

Advanced Diagnostic Imaging Suite

• IOL Master 700: Measures precise axial length and crystalline lens thickness.
• Pentacam HR: Provides 3D cross-sectional analysis of corneal topography and anterior chamber depth.
• Specular Microscope: Evaluates corneal endothelial cell density to ensure long-term safety.

Step-by-Step Surgical Process and Recovery Guide

On the day of the procedure, topical numbing drops are applied, and the lens is gently inserted through a microscopic, 2.8mm micro-incision. The entire process takes less than 30 minutes for both eyes combined and is virtually painless.

Postoperative Recovery Milestones

Why the Eye Welcomes the Collamer Lens Material

Because Collamer shares a nearly identical molecular profile with human tissue proteins, the eye perceives it as an organic extension of itself. Furthermore, it features a built-in UV-blocking mechanism, providing permanent vision correction while simultaneously shielding the delicate internal structures of the eye from premature aging.

Frequently Asked Questions (Q&A)

Q. Will I be able to feel the lens inside my eye?
A. No. Because the lens is placed securely behind the iris, it should be completely imperceptible. A successful surgery means you will never feel its presence.

Q. Does the lens last a lifetime?
A. Yes. The lens is engineered for permanent, lifelong durability. However, because the procedure is fully reversible, it can be safely removed or replaced at any point if your ocular health profile changes.

Q. When can I resume working out or applying makeup?
A. Light walking is permitted on Day 3, eye makeup can be reintroduced after 1 week, and strenuous, high-impact exercise is safe to resume after 2 weeks.

Closing Thoughts: A Surgery to Protect Your Natural Eyes

Your eyes are the irreplaceable windows through which you experience the world. ICL surgery does not involve altering or replacing those windows; rather, it is the delicate art of seamlessly placing a protective, high-definition pane of glass inside. For those with thin corneas or severe dry eye tendencies, the EVO+ Aqua ICL stands as the most stable, reliable, and advanced alternative available.

“We are dedicated to walking with you every step of the way, until the moment your world becomes beautifully clear.”