The three procedures that dominate the vision correction landscape — LASIK, PRK, and EVO ICL — are each capable of producing excellent outcomes. They are also meaningfully different in mechanism, candidacy requirements, recovery profile, cost, and the patient populations they serve best.
This comparison gives you the clinical data to understand those differences clearly. It is part of the broader Vision Correction Procedures Compared hub, which also covers SMILE and Refractive Lens Exchange for patients who fall outside the comparison below.
Procedure Overview
LASIK
LASIK (Laser-Assisted In Situ Keratomileusis) creates a thin corneal flap using a femtosecond laser, lifts it to expose the underlying stroma, applies an excimer laser to reshape the corneal bed, and repositions the flap. The flap bonds within minutes without sutures.
LASIK is the most widely performed elective surgery in the world. It is FDA-approved, extensively studied over 25+ years, and produces predictable, durable outcomes in appropriately selected candidates.
PRK
PRK (Photorefractive Keratectomy) was the predecessor to LASIK and remains its close clinical equivalent in terms of long-term outcomes. Instead of creating a flap, the surgeon removes the corneal epithelium (surface layer), applies the excimer laser directly to the stroma, and covers the surface with a bandage contact lens during the healing period.
PRK is often described as LASIK without the flap — which is both its limitation (slower recovery) and its advantage (no flap-related complications, better biomechanical integrity).
EVO ICL
The EVO ICL (Implantable Collamer Lens) is a phakic intraocular lens — a corrective lens implanted inside the eye without removing the natural crystalline lens. Made from Collamer, a biocompatible collagen-derived material, it sits in the ciliary sulcus behind the iris and in front of the natural lens.
EVO ICL does not touch the cornea at all. It corrects myopia up to -20.00D and astigmatism up to -6.00D, and it is the only major refractive procedure that is fully reversible.
Side-by-Side Comparison
| Factor | LASIK | PRK | EVO ICL | |——–|——-|—–|———| | FDA Approval | Yes | Yes | Yes | | Mechanism | Corneal reshaping (flap) | Corneal reshaping (surface) | Phakic IOL implantation | | Corneal tissue removal | Yes | Yes | No | | Reversible | No | No | Yes | | Myopia range | Up to -12.00D | Up to -12.00D | Up to -20.00D | | Hyperopia | Yes (up to +6.00D) | Yes | No (US) | | Astigmatism | Up to -5.00D | Up to -5.00D | Up to -6.00D (toric) | | Corneal thickness req. | 480–500+ microns | Similar | Not applicable | | Recovery (functional) | 1–2 days | 1–2 weeks | 1–7 days | | Recovery (optimal VA) | 1–4 weeks | 6–12 weeks | 2–6 weeks | | Dry eye risk | Moderate | Low-Moderate | Minimal | | Cost (per eye) | $1,800–$2,800 | $1,800–$2,400 | $3,500–$5,000 | | Enhancement rate | 2–5% | 2–4% | <1% | | Thin cornea eligible | Rarely | Sometimes | Yes | | Active sports/military | With caution | Preferred | Preferred | | Age range (typical) | 18–45 | 18–45 | 21–45 |
Candidacy: Who Qualifies for Each?
LASIK Candidates
Ideal LASIK candidates are adults 18 and older with stable prescriptions (no significant change in two years), adequate corneal thickness, and no significant dry eye disease. The corneal flap requires a minimum tissue bed to be safe.
LASIK is generally not recommended for:
- Patients with corneal thickness below approximately 480 microns
- Patients with active or moderate-to-severe dry eye
- Patients who participate in contact sports or occupations with flap-disruption risk
- Patients with large pupils in low light (which may increase halo risk with some platforms)
PRK Candidates
PRK serves the same prescription range as LASIK but with a different anatomical threshold. Patients with corneas that are too thin for a safe LASIK flap may still be excellent PRK candidates, because PRK removes less total tissue volume for equivalent corrections.
PRK is specifically preferred for:
- Military personnel and fighter pilots (FAA/military guidelines often mandate surface ablation)
- Contact athletes (boxing, martial arts, football) where flap dislodgement is a concern
- Patients with forme fruste keratoconus (irregular topography without full keratoconus)
- Patients with a history of corneal erosion or surface irregularity
EVO ICL Candidates
EVO ICL serves a different patient profile. It is particularly well-suited for:
- High myopes (above -8.00D to -10.00D) where laser surgery would remove excessive tissue
- Patients with thin corneas who are poor laser candidates
- Patients with chronic dry eye disease, who may experience significant worsening after corneal nerve disruption from LASIK
- Patients who want a reversible procedure
- Patients who value the exceptional optical quality the ICL provides, particularly at night
EVO ICL requires adequate anterior chamber depth (typically 3.0mm or greater) and an appropriate white-to-white measurement to ensure proper vault of the lens over the natural crystalline lens.
Recovery: What to Expect From Each
LASIK Recovery
LASIK recovery is the fastest of the three. Most patients experience:
- Day 1: Mild scratchiness, tearing, light sensitivity for 4–6 hours post-procedure. Functional vision improves within hours.
- Day 2–7: Vision continues to sharpen. Minor fluctuations are normal.
- Week 2–4: Stable vision for the vast majority of patients.
- 1–3 months: Optimal acuity and contrast sensitivity fully established.
Return to office work: day 1 or 2. Driving: typically cleared within 48 hours.
PRK Recovery
PRK recovery is slower due to epithelial regeneration. Patients should expect:
- Day 1–4: Significant light sensitivity, tearing, and moderate discomfort while wearing the bandage contact lens. Vision is blurry.
- Day 4–7: Bandage lens is removed as the epithelium closes. Vision begins improving.
- Week 2–4: Functional vision for most tasks. Some fluctuation common.
- Month 2–3: Optimal visual acuity achieved. Some patients (particularly those with higher prescriptions) require up to six months for full stabilization.
EVO ICL Recovery
EVO ICL recovery is intermediate:
- Day 1: Most patients notice dramatic improvement from their pre-surgical correction.
- Week 1–2: Some light sensitivity and mild halos around lights, particularly at night.
- Month 1: Vision is stable and halos diminish significantly for most patients.
- Month 2–3: Full visual stability and contrast adaptation.
Outcomes: How Do the Numbers Compare?
All three procedures produce excellent outcomes when performed on appropriate candidates by experienced surgeons. Peer-reviewed literature consistently shows:
% Achieving 20/20 or Better:
- LASIK: 96–98%
- PRK: 95–97%
- EVO ICL: 96–99%
Patient Satisfaction:
- LASIK: ~95%
- PRK: ~94%
- EVO ICL: ~97–99%
EVO ICL satisfaction rates tend to be slightly higher than laser procedures, which several studies attribute to the exceptional optical quality of the implanted lens — particularly in mesopic (dim light) conditions where laser-ablated corneas can produce more halos and glare than ICL optics.
Enhancement (re-treatment) rates are lowest for EVO ICL, partly because the procedure itself can be reversed or revised by exchanging the lens.
Cost: Understanding the Price Difference
LASIK and PRK are generally similar in cost. EVO ICL carries a meaningful premium due to the cost of the implant itself and the additional surgical complexity.
Typical ranges (both eyes, 2026):
- LASIK: $3,600–$5,600
- PRK: $3,600–$4,800
- EVO ICL: $7,000–$10,000
When evaluating cost, consider:
- The long-term savings from eliminating glasses and contacts (typically $500–$1,000 per year)
- HSA and FSA eligibility (all three qualify in most circumstances)
- Financing availability (most practices offer CareCredit or similar)
See The Cost of Vision Correction: LASIK, PRK, and EVO ICL Compared for a detailed breakdown including what drives price variation and how to evaluate cost-per-outcome value.
Special Situations: Which Procedure Wins?
High prescription (above -8.00D): EVO ICL produces better optical quality than laser procedures at high corrections and avoids removing excessive corneal tissue. EVO ICL wins.
Thin corneas: EVO ICL does not touch the cornea. PRK is the preferred laser alternative. LASIK is generally not recommended.
Dry eye: EVO ICL is the preferred option; it does not disrupt corneal nerves. SMILE is a reasonable laser alternative due to lower nerve disruption than LASIK.
Contact athletes: PRK, SMILE, or EVO ICL — any flapless option. No flap means no flap dislodgement risk.
Fastest recovery: LASIK. Nothing else comes close for day-one functional vision.
Budget: LASIK and PRK are significantly more affordable than EVO ICL for most patients.
Reversibility: EVO ICL is the only reversible option.
Presbyopia: None of the three comprehensively solves presbyopia. See Vision Correction After 40: Presbyopia Options for the appropriate solutions.
Key Answer Pages
- What Is the Best Vision Correction Surgery?
- Which Vision Correction Procedure Has the Fastest Recovery?
- Can I Get Vision Correction If I Have Dry Eyes?
- Which Vision Correction Is Best for High Prescriptions?
- Which Vision Correction Is Safest?
Finding a Qualified Provider
The outcomes data above reflects results from experienced, well-equipped practices. The full range of published outcomes is wider — reflecting the variation between surgeons and technology platforms.
Our LASIK Surgery Awards recognize practices that consistently perform at the high end of published outcome benchmarks. Our EVO ICL Awards apply the same recognition framework to phakic IOL specialists. Use these resources as a starting point when building your shortlist of surgeons.
For a full comparison of all available procedures — including SMILE and Refractive Lens Exchange — return to the Vision Correction Procedures Compared hub.
*This content is educational and does not constitute medical advice. All surgical decisions should be made in consultation with a qualified ophthalmologist following a comprehensive pre-operative evaluation.*