ICL vs SMILE Pro for High Myopia in Korea: Which Is Better?
ICL vs SMILE Pro for High Myopia in Korea: Which Is Better?
For people with high myopia, choosing a vision correction procedure can be more complicated than simply deciding between two popular technologies. ICL and SMILE Pro use very different approaches to correct nearsightedness, and the better option depends on your prescription, corneal characteristics, eye anatomy, lifestyle, and overall eye health.
ICL, or Implantable Collamer Lens, corrects vision by placing a lens inside the eye while preserving the natural crystalline lens. SMILE Pro is a minimally invasive laser procedure that corrects myopia by removing a small lenticule from within the cornea.
Both can provide excellent vision for appropriately selected patients. Research comparing ICL and SMILE in moderate-to-high and high myopia has generally found comparable refractive effectiveness, while several studies have reported differences in visual quality, higher-order aberrations, and safety indices.
For international patients considering vision correction in Korea, the most useful question is therefore not simply, "Which procedure is better?" The more important question is, "Which procedure is better suited to my eyes?"
What Is ICL for High Myopia?
How ICL Corrects Vision
ICL is an implantable lens designed to correct refractive errors without reshaping or removing central corneal tissue.
The lens is positioned inside the eye, behind the iris and in front of the natural crystalline lens. Because the natural lens remains in place, ICL is different from cataract surgery or refractive lens exchange.
EVO ICL is indicated for specific ranges of myopia, depending on the applicable lens model and regulatory labeling. FDA labeling includes selected patients with myopia from -3.00 D through higher levels, subject to requirements such as appropriate anterior chamber depth and stable refraction.
Why High Myopia Patients Consider ICL
ICL can be particularly attractive for patients with stronger prescriptions because it does not depend on removing a large amount of corneal tissue.
This may be relevant when a patient's prescription, corneal thickness, or corneal shape makes laser correction less desirable.
ICL can also be considered when maintaining the corneal structure is an important part of the treatment discussion.
What Is SMILE Pro for High Myopia?
How SMILE Pro Works
SMILE Pro is a laser-based form of small incision lenticule extraction. Instead of creating a traditional LASIK flap, the procedure uses a femtosecond laser to create and remove a small piece of corneal tissue called a lenticule through a small incision.
Removing the lenticule changes the shape and focusing power of the cornea, correcting myopia.
Because SMILE Pro is a corneal procedure, the patient's corneal thickness, shape, prescription, and overall corneal health are important when determining candidacy.
Why Patients Choose SMILE Pro
SMILE Pro may appeal to patients who prefer a laser-based procedure and want to avoid an implanted lens.
It also uses a small corneal incision rather than a conventional LASIK flap.
However, being minimally invasive does not mean that SMILE Pro is suitable for every patient with high myopia. A detailed examination is still necessary.
ICL vs SMILE Pro: Quick Comparison
Key Differences
FeatureICLSMILE ProTreatment approachImplantable lensCorneal laser procedureCorneal tissue removalNoYesNatural lensPreservedPreservedFlapNoNoIntraocular surgeryYesNoHigh myopiaSuitable for selected patientsSuitable for selected patientsThin corneasMay be considered depending on overall anatomyMay limit suitabilityAstigmatismToric ICL may be availableCan correct selected astigmatismMain anatomical concernInternal eye anatomyCorneal anatomyLong-term considerationsImplanted lens requires monitoringCornea remains surgically reshapedReversibilityLens can potentially be removed or exchangedCorneal tissue removal is permanent
Neither procedure wins in every category. The differences are important because they affect which patients may benefit most from each approach.
Which Is Better for Very High Myopia?
ICL May Have an Advantage for Selected Higher Prescriptions
For very high myopia, ICL may be particularly worth discussing when corneal laser treatment would require substantial tissue removal or when the corneal profile is not ideal for laser correction.
A systematic review comparing ICL with SMILE for high myopia found that ICL had better pooled efficacy and safety indices in the included studies, while predictability was similar. The analysis also found a higher risk of halos with ICL.
However, those results do not mean ICL is automatically better for every high-myopia patient.
The studies included different patient populations, surgical techniques, follow-up periods, and lens generations. Individual candidacy remains critical.
SMILE Pro Can Still Be an Excellent Option
High myopia does not automatically mean that ICL is preferable.
If the cornea has adequate thickness and an appropriate shape, and the prescription falls within the treatment range, a patient may be a suitable candidate for SMILE Pro.
A long-term comparative study of high-myopia patients found that both SMILE and EVO ICL provided safe and effective correction at four years. Interestingly, SMILE showed slightly better long-term refractive predictability in that particular study, while ICL-treated eyes had lower spherical aberration and coma.
This highlights why a procedure should not be selected based on prescription alone.
ICL vs SMILE Pro for Thin Corneas
Why Corneal Thickness Matters
One of the most important differences between the procedures is what happens to the cornea.
SMILE Pro corrects vision by removing corneal tissue. Therefore, the surgeon must determine whether enough tissue can safely be removed while maintaining an appropriate corneal structure.
ICL does not require corneal tissue removal for refractive correction.
As a result, a patient with a high prescription and relatively thin corneas may be evaluated for ICL when laser correction is less suitable.
However, thin corneas do not automatically make someone an ICL candidate.
The anterior chamber, endothelial cell health, eye pressure, retinal health, and other factors must still be evaluated.
ICL vs SMILE Pro for Visual Quality
What Research Shows
Visual quality is more complicated than simply measuring whether a patient can read a particular line on an eye chart.
Higher-order aberrations, contrast sensitivity, glare, halos, and other optical factors can influence how vision feels in everyday situations.
Several comparative studies have found that ICL may induce fewer higher-order aberrations than SMILE in patients with moderate-to-high or high myopia. A meta-analysis found better visual-quality parameters with ICL in several measures, although both procedures produced effective correction.
A separate matched comparative study of patients with high myopia found better refractive predictability and higher safety and efficacy indices following ICL, along with fewer higher-order aberrations.
Does ICL Mean Better Night Vision?
Not necessarily.
Although some studies have reported advantages in optical quality after ICL, patients can still experience visual disturbances such as halos.
In one comparative study, halos were more common after ICL, while patients undergoing SMILE reported other visual disturbances such as starbursts and fluctuations.
Your pupil size, prescription, ocular anatomy, and individual visual system can all influence postoperative night vision.
ICL vs SMILE Pro: Recovery Differences
SMILE Pro Recovery
SMILE Pro generally involves a small corneal incision and does not require the creation of a LASIK-style flap.
Many patients experience relatively rapid improvement in vision, but recovery is still individual.
Temporary dryness, fluctuating vision, light sensitivity, or other visual symptoms can occur during the healing period.
Patients should follow their surgeon's instructions regarding eye drops, eye protection, exercise, swimming, and other activities.
ICL Recovery
ICL involves surgery inside the eye, so postoperative monitoring is especially important.
Vision can improve quickly, but patients still need follow-up examinations to check the position of the lens, eye pressure, inflammation, and overall recovery.
The recovery schedule can vary according to the patient's eye health and the surgeon's protocol.
Which Procedure Has Fewer Risks?
Different Procedures Mean Different Risks
It is difficult to say that one procedure is universally safer because ICL and SMILE Pro have fundamentally different risk profiles.
SMILE Pro is performed on the cornea. Potential issues can include dry eye symptoms, residual refractive error, corneal complications, and visual disturbances.
ICL is an intraocular procedure. Potential complications can include changes in intraocular pressure, inflammation, cataract formation, endothelial cell loss, lens-related problems, infection, or the need for repositioning or removal.
The risks depend heavily on patient selection and surgical technique.
Why Patient Selection Matters
A procedure that is highly appropriate for one patient may not be appropriate for another.
For example, a patient with excellent corneal measurements and moderate high myopia may be a strong laser-surgery candidate.
Another patient with a high prescription, thin corneas, or other corneal considerations may benefit from an ICL evaluation.
The correct decision comes from matching the treatment to the patient's anatomy.
Which Is More Suitable for High Myopia With Astigmatism?
Toric ICL
Patients with myopia and astigmatism may be considered for a toric ICL when their prescription and eye anatomy meet the requirements.
The toric design is intended to correct both myopia and certain levels of astigmatism.
The exact range depends on the lens model and applicable regulatory approval.
SMILE Pro for Astigmatism
SMILE can also correct selected combinations of myopia and astigmatism.
The important question is whether the patient's cornea can safely undergo the required treatment.
An ophthalmologist may compare the corneal measurements and refractive profile with the available treatment options before recommending a procedure.
Who May Be a Better Candidate for ICL?
ICL May Be Worth Discussing If You Have
ICL may be particularly worth discussing if you have:
- High or very high myopia
- Corneal thickness that makes laser correction less attractive
- Appropriate anterior chamber depth
- Adequate endothelial cell density
- Stable refraction
- Healthy eyes overall
- A preference to avoid corneal tissue removal
- Myopia with astigmatism that may be suitable for toric ICL
These are general considerations, not a diagnosis of candidacy.
When ICL May Not Be Appropriate
ICL may not be suitable when the eye does not have the required anatomy or health characteristics.
Potential concerns include inadequate anterior chamber depth, insufficient endothelial cell density, uncontrolled glaucoma, significant inflammation, certain cataracts, unstable refraction, or other ocular conditions.
A comprehensive examination is necessary before making a decision.
Who May Be a Better Candidate for SMILE Pro?
SMILE Pro May Be Considered If You Have
SMILE Pro may be attractive for patients who:
- Have suitable corneal thickness
- Have an appropriate corneal shape
- Have a prescription within the treatment range
- Prefer laser vision correction
- Want to avoid an intraocular implant
- Have appropriate overall eye health
The exact treatment range and eligibility criteria depend on the laser platform, local regulations, and clinical assessment.
Why Corneal Evaluation Is Essential
Before SMILE Pro, your ophthalmologist should assess whether the cornea can safely tolerate the planned tissue removal.
This can involve corneal topography or tomography, thickness measurements, refraction, tear-film assessment, and other tests.
A high prescription with an unsuitable cornea may make SMILE Pro a poor choice even if the procedure is technically available.
ICL vs SMILE Pro in Korea: What Should International Patients Consider?
Do Not Choose Based on the Procedure's Popularity
Medical tourists sometimes arrive in Korea with a specific procedure already selected.
That can make the consultation unnecessarily restrictive.
Instead, consider having a comprehensive examination and discussing ICL, SMILE Pro, LASIK, and other appropriate alternatives.
A good consultation should explain why a particular procedure is being recommended for your eyes.
Plan Enough Time in Korea
If you are traveling to Korea for vision correction, do not schedule surgery so tightly that there is no room for examination or follow-up.
A sensible medical travel plan should allow time for:
- Initial consultation
- Diagnostic testing
- Treatment planning
- Surgery
- Early postoperative monitoring
- Follow-up before departure
The appropriate schedule varies by patient and procedure.
Bring Previous Eye Records
International patients should consider bringing recent:
- Glasses prescriptions
- Contact lens prescriptions
- Eye examination reports
- Previous surgical records
- Relevant diagnostic imaging
- Information about previous eye conditions
This can help the ophthalmologist understand your history more accurately.
How Much Does ICL or SMILE Pro Cost in Korea?
Why Treatment Prices Vary
There is no single universal price for either procedure.
Costs can depend on:
- Procedure type
- Technology and equipment
- Surgeon and facility fees
- Preoperative diagnostic testing
- Lens type for ICL
- Whether a toric ICL is required
- Postoperative medications
- Follow-up care
- Services provided to international patients
ICL can involve the additional cost of the implanted lens, while SMILE Pro pricing may reflect the specific laser platform and treatment package.
Patients should request an itemized quotation after their examination rather than choosing a clinic solely because it advertises a low price.
What Should You Ask During an ICL or SMILE Pro Consultation?
Important Questions for Your Ophthalmologist
Before deciding, ask:
- Which procedure is more appropriate for my prescription?
- How much corneal tissue would SMILE Pro require?
- Is my cornea suitable for laser vision correction?
- Is my anterior chamber deep enough for ICL?
- Is my endothelial cell count adequate?
- Do I have any retinal concerns related to high myopia?
- Would a toric ICL be appropriate for my astigmatism?
- What are the main risks for my eyes?
- What visual side effects should I realistically expect?
- How long should I remain in Korea after surgery?
- What follow-up will I need after returning home?
- What is included in the total treatment price?
These questions can help you compare the procedures based on your individual circumstances rather than marketing claims.
So, Which Is Better: ICL or SMILE Pro?
ICL May Be More Attractive When
ICL may have an advantage in the discussion when a patient has high myopia combined with corneal characteristics that make laser treatment less suitable.
It may also be appealing when preserving corneal tissue is a priority and the patient's internal eye anatomy is suitable.
Research has found favorable visual-quality and safety outcomes with ICL in many high-myopia comparisons, although the evidence does not establish ICL as universally superior.
SMILE Pro May Be More Attractive When
SMILE Pro may be preferable for a patient with suitable corneal anatomy who wants a laser-based procedure and does not want an intraocular implant.
It avoids placing a lens inside the eye and can provide effective correction for appropriately selected patients with high myopia.
Longer-term comparative evidence shows that both SMILE and ICL can provide effective high-myopia correction, with differences in specific visual and refractive outcomes rather than one procedure winning every category.
Conclusion
So, which is better for high myopia in Korea: ICL or SMILE Pro?
There is no universal answer.
ICL may be especially worth considering for patients with high prescriptions, certain corneal limitations, or a preference to avoid corneal tissue removal. SMILE Pro may be an excellent option for patients whose corneas are suitable for laser correction and who prefer a flap-free corneal procedure.
Current comparative research generally shows that both approaches can effectively correct high myopia. Some studies and meta-analyses report advantages for ICL in safety indices, higher-order aberrations, or certain measures of visual quality, while longer-term research has also found comparable outcomes and, in some measures, slightly better predictability with SMILE.
For international patients considering vision correction in Korea, the most important step is a comprehensive eye examination before choosing a procedure.
The right treatment is not necessarily the most expensive, newest, or most heavily marketed option. It is the one that appropriately matches your prescription, cornea, internal eye anatomy, lifestyle, and long-term visual goals.
FAQs About ICL vs SMILE Pro for High Myopia
1. Is ICL better than SMILE Pro for high myopia?
Not for everyone. Studies suggest that both can provide effective correction, while ICL may offer advantages in some measures of visual quality and safety for selected high-myopia patients. Individual anatomy should determine the choice.
2. Which is better for very high myopia?
ICL may be particularly worth considering at very high prescriptions, especially when corneal tissue limitations make laser correction less suitable. However, eligibility depends on eye anatomy and the specific lens indication.
3. Is ICL safer than SMILE Pro?
Neither should be described as universally safer. ICL and SMILE Pro have different risks because ICL is an intraocular procedure while SMILE Pro modifies the cornea.
4. Can I have SMILE Pro if I have thin corneas?
Possibly, depending on your measurements, but thin corneas can affect laser-surgery eligibility. A detailed corneal evaluation is needed to determine whether sufficient tissue can safely be treated.
5. Can ICL correct high myopia with astigmatism?
Yes, selected patients with myopic astigmatism may be candidates for toric ICL. The prescription and eye anatomy must meet the requirements of the applicable lens.
6. Which procedure has better visual quality?
Several studies have found lower higher-order aberrations and favorable optical-quality measures after ICL compared with SMILE, particularly in high myopia. However, visual disturbances such as halos can occur after ICL, so individual results vary.
7. Does ICL remove corneal tissue?
No. ICL corrects vision using an implanted lens inside the eye rather than reshaping the cornea.
8. Does SMILE Pro use an implant?
No. SMILE Pro is a corneal laser procedure and does not involve placing an artificial lens inside the eye.
9. Can international patients have ICL or SMILE Pro in Korea?
International patients can seek vision correction in Korea, but they should allow adequate time for examination, treatment, recovery, and follow-up. A procedure should only be scheduled after confirming candidacy.
10. How do I decide between ICL and SMILE Pro?
Start with a comprehensive ophthalmic examination. Your prescription, corneal thickness and shape, anterior chamber depth, endothelial cell health, retinal condition, and overall eye health can help determine which options are appropriate.
