What services does the Cloud Hospital platform provide?

The platform supports overseas marketing, patient reservations, payment management, follow-up care, and multilingual communication.

How many languages does the platform support?

Cloud Hospital supports 40 languages, including English, Japanese, Chinese, and Russian.

What type of platform is Cloud Hospital?

Cloud Hospital is a B2B Software-as-a-Service platform that supports hospitals in managing international patient engagement.

ICL vs. LASIK: Best Vision Correction for High Prescriptions

If you’ve lived with high myopia — the kind where your glasses feel like magnifying lenses and you can’t see your phone unless it’s close to your face — you’ve probably wondered which vision correction procedure offers the best results: ICL or LASIK.

At SNU Eye Clinic in Gangnam, this is one of the most important and common conversations we have. Under the leadership of Dr. Chung Eui Sang, who has completed more than 50,000 refractive and cataract surgeries and over 5,000 ICL implantations, we’ve seen firsthand how outcomes differ depending on whether a patient chooses LASIK or ICL — especially at higher prescriptions.

This guide mirrors the honest, reassuring explanation we give patients in consultation rooms every day.

Understanding the Basics: Two Very Different Technologies

LASIK: Reshaping the Cornea

LASIK corrects vision by removing corneal tissue. A laser creates a flap, another laser reshapes the cornea underneath, and the flap is replaced.
Most patients recover quickly and achieve excellent vision — especially those with mild to moderate prescriptions.

A helpful analogy:
LASIK is like carefully sculpting the front window of the eye.

ICL: Adding a Lens Inside the Eye

ICL (Implantable Collamer Lens) places a soft, biocompatible lens behind the iris and in front of the natural lens. Nothing is removed or reshaped.

A simple way to understand it:
ICL acts like a permanent, invisible contact lens you never have to take out.

This makes it especially powerful for very high prescriptions.

Which Is Better for High Prescriptions?

To put it plainly: for high myopia, ICL is often safer, clearer, and more stable than LASIK.

Many patients come to us believing LASIK is the universal solution — only to learn that their prescription or corneal thickness makes ICL the better long-term option.

Let’s break down the reasons.

1. Effectiveness for Strong Prescriptions

LASIK limitations in high myopia

LASIK removes corneal tissue. When prescriptions climb above -7.00 or -8.00:

Too much cornea would need to be removed
The eye may become biomechanically weaker
Risk of postoperative ectasia (corneal instability) increases
Night halos or glare are more common
Optical quality may not match patient expectations

Even top surgeons must be conservative to protect long-term safety.

ICL advantages in high myopia

ICL does not remove tissue and does not weaken the cornea.

It is routinely effective for:

-8.00 to -15.00 diopters
Even higher ranges in certain cases
Thick or thin corneas alike
Patients with high astigmatism

Many of our happiest patients at SNU Eye Clinic are those who thought they were “too high for LASIK” but achieved crisp, natural vision with ICL.

Winner for high prescriptions: ICL

2. Visual Quality: Sharpness, Night Vision, and Contrast

High myopia LASIK can introduce visual aberrations because the cornea must be reshaped significantly.

Common concerns include:

Increased halos around lights
Slight night vision reduction
Increased glare or starbursts
Mild loss of contrast in large corrections

In contrast, ICL tends to deliver very high-quality optics because it leaves the cornea untouched and uses a premium, highly transparent Collamer material.

Patients often describe their new vision after ICL as “ultra-clear,” “HD,” or “the most natural clarity I’ve ever had.”

Winner for optical quality in high myopia: ICL

3. Long-Term Safety Considerations

LASIK safety for high prescriptions

LASIK is safe for many people — but as prescription climbs, safety margins narrow:

Cornea becomes thinner
Structural integrity changes
Dry eye can become long-term
Regression risk increases

This is why we decline LASIK for many high-prescription candidates at SNU Eye Clinic — not because LASIK is bad, but because your cornea should be protected for life.

ICL long-term safety

ICL avoids these concerns entirely:

Preserves corneal structure
Does not induce dry eye
Can be removed or exchanged in the future
Provides stable, predictable long-term outcomes
Allows future cataract surgery without complication

For patients looking several decades ahead — especially those in their 20s and 30s — this flexibility is a major advantage.

Winner for long-term safety: ICL

4. Recovery & Comfort Experience

LASIK recovery

Fast vision improvement
Mild burning sensation for several hours
Dry eye is common
Flap requires protection during early healing
Vision may fluctuate for days to weeks

ICL recovery

Very little discomfort
No corneal dryness caused by surgery
Vision often improves within hours
No flap, so fewer activity restrictions
Patients usually return to work the next day

To be honest, many patients tell us the procedure itself was far easier than expected — often quicker and calmer than a dental cleaning.

Winner for comfort, especially for dry-eye patients: ICL

5. Reversibility and Future Flexibility

This is where the difference becomes dramatic.

LASIK

Permanent reshaping of the cornea. Cannot be reversed.

ICL

Fully removable.
Upgradable.
Compatible with future technologies.
Works seamlessly alongside cataract surgery later in life.

For younger patients — especially those in demanding visual careers (pilots, designers, engineers, developers) — this reversibility is reassuring.

Winner for future-proofing: ICL

Quick Comparison Table

Feature	ICL	LASIK
Best candidates	High myopia, thin corneas, dry eye	Mild–moderate myopia
Removes tissue?	No	Yes
Reversible?	Yes	No
Ideal for -7.00 and above	✔️	Often not recommended
Dry eye risk	Low	Higher
Night vision quality	Very stable	Can decrease at high prescriptions
Return to work	Often next day	Often next day (dryness varies)
Long-term safety for high myopia	Excellent	Limited

Why SNU Eye Clinic Often Recommends ICL for High Prescriptions?

In Gangnam’s highly competitive medical district, patients choose SNU Eye Clinic because of our accuracy-first, safety-first approach.

For high prescriptions, we recommend the procedure that consistently shows:

Better optical quality
Safer long-term biomechanics
Higher predictability
Less dryness
Greater flexibility for the future

That procedure is often ICL.

Dr. Chung’s extensive surgical volume — especially with Toric ICL — gives patients a uniquely stable, precise experience.

A Real Case from SNU Eye Clinic

A 31-year-old designer visited us with:

-10.50 D myopia
Astigmatism
Dryness from years of contact lens wear
A corneal thickness that made LASIK unsafe

She underwent EVO Toric ICL.
The next morning she achieved 20/20. By her one-week visit, she said:

“This is the first time since childhood that I can see without strain. I wish I had done this years earlier.”

This is a common outcome — not an exception.

So… Which Is Best for High Prescriptions?

Here’s the honest conclusion we share with patients at SNU Eye Clinic:

For most high-myopia patients, ICL offers a safer, clearer, and more stable long-term solution than LASIK.

LASIK is still excellent for many people — especially those in the mild-to-moderate range — and we perform it routinely for ideal candidates. But for strong prescriptions, the eye benefits more from an additive, reversible approach.

If you want to know whether you’re a candidate for LASIK, SMILE, or ICL, the best next step is a full diagnostic consultation at a precision-focused clinic like SNU Eye Clinic. With advanced imaging and individualized planning, we can determine exactly which option is safest and most effective for your eyes.