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LASIK vs PRK vs SMILE: Which laser eye surgery is right for you?
LASIK, PRK, and SMILE are Health Canada–approved laser procedures that correct the same vision problems by reshaping the cornea. Each works differently, with unique recovery times and risks.
What is LASIK, PRK, and SMILE?
All three procedures use a laser to reshape the cornea to correct myopia, hyperopia, and astigmatism. They mainly differ in how the cornea is accessed and how it heals afterward.
LASIK (Laser-Assisted In Situ Keratomileusis)
The most-performed refractive surgery worldwide (40+ million procedures). The most popular option to treat nearsightedness (myopia). Vision stabilizes within 24–48 hours.
- Treats: Myopia up to −10 D, hyperopia up to +4 D, astigmatism up to 6 D
- Recovery: Functional the next day; full stabilization in 1–3 months
- Key advantage: Fastest return to normal activities
- Key consideration: Corneal flap is permanent; not ideal for contact sports or thin corneas
PRK (Photorefractive Keratectomy)
The original laser vision correction technique (developed 1980s) and still widely performed. No flap is created. The outer layer of your eye takes 4-5 days to heal.
- Treats: Myopia, hyperopia, and astigmatism (same range as LASIK)
- Recovery: 2–3 days of discomfort; functional clarity in 1-2 weeks; full stabilization in 3–6 months
- Key advantage: No flap risk; stronger cornea post-op; preferred for thin corneas and high-risk lifestyles
- Key consideration: Longer, more uncomfortable recovery than LASIK or SMILE
SMILE (Small Incision Lenticule Extraction)
The newest, most advanced laser vision option. It corrects sight through a tiny micro-incision for a gentler, faster recovery. No corneal flap is created, which means minimal nerve disruption and the lowest risk of dry eyes.
- Treats: Myopia up to −10 D and astigmatism up to 5 D (hyperopia approval still expanding)
- Recovery: Vision improves in 24–72 hours; stabilization in 1–3 months
- Key advantage: Lowest dry eye risk; flapless; ideal for active patients
- Key consideration: Enhancements are technically more complex; does not yet treat hyperopia
How does each surgery work?
LASIK
- Flap creation: A femtosecond laser creates a thin, hinged corneal flap.
- Corneal reshaping: An excimer laser sculpts the exposed tissue underneath to correct vision.
- Flap repositioning: The flap is laid back in place and self-seals without stitches.
PRK
- Epithelial removal: The surgeon gently removes the cornea’s outer surface cells.
- Corneal reshaping: An excimer laser sculpts the newly exposed cornea.
- Protective lens: A bandage contact lens is applied while the surface cells grow back (takes 4–5 days).
SMILE
- Lenticule creation: A femtosecond laser shapes a tiny disc of tissue (lenticule) inside the intact cornea.
- Micro-incision: The surgeon makes a tiny 2–4 mm opening at the edge of the cornea.
- Lenticule extraction: The disc is removed through the incision, permanently correcting the corneal shape.
LASIK vs PRK vs SMILE: Full comparison
Every procedure achieves equivalent long-term visual outcomes. The differences lie in recovery speed, dry eye risk, flap presence, and candidacy requirements.
Feature | LASIK | PRK | SMILE |
|---|---|---|---|
Flap + excimer laser | Surface ablation, no flap | Flapless lenticule extraction | |
Myopia, hyperopia, astigmatism | Myopia, hyperopia, astigmatism | Myopia + astigmatism | |
Yes (~24-48 hrs) | No (1-2 weeks) | Mostly (24-72 hrs) | |
1–3 months | 3–6 months | 1–3 months | |
Mild (1–2 days) | Moderate (2–3 days) | Mild (1–2 days) | |
Moderate | Low–moderate | Lowest | |
Yes | No | No | |
Limited | Yes | Yes | |
Caution (flap risk) | Recommended | Recommended | |
Straightforward | Straightforward | More complex | |
$1,500–$3,500 | $1,400–$2,800 | $2,000–$3,500 |
How much does laser eye surgery cost in Canada?
Laser vision correction is elective and not covered by provincial health plans. Most private health insurance plans and Health Spending Accounts (HSAs) may partially reimburse the cost. LASIK MD offers 0% interest financing with quick approval and a Lowest Price Guarantee.
City | LASIK / eye | PRK / eye | SMILE / eye |
|---|---|---|---|
$1,500–$3,000 | $1,400–$2,500 | $2,000–$3,200 | |
$1,800–$3,500 | $1,500–$2,800 | $2,200–$3,500 | |
$1,800–$3,500 | $1,500–$2,800 | $2,200–$3,500 | |
$1,500–$3,000 | $1,400–$2,500 | $2,000–$3,200 | |
$1,500–$3,000 | $1,400–$2,500 | $2,000–$3,000 |
⚠ Advertised "starting from" prices at some clinics exclude surgeon fees, wavefront mapping, or aftercare. Always confirm what is included. LASIK MD pricing is all-inclusive.
💡 Long-term value: laser surgery vs. glasses & contacts Average annual spending on glasses + contacts in Canada: $500–$1,000/year Over 10 years: $5,000–$10,000, often more than the one-time cost of surgery LASIK MD's 20/20 Vision Commitment means your investment is protected long-term |
What are the risks?
All three procedures are extensively studied and considered very safe. Serious complications affect fewer than 1% of patients. Knowing each procedure's specific risk profile allows you to make a more informed choice.
Risks shared by all three procedures
- Temporary dry eye: Common and usually improves with drops within weeks to months.
- Halos / starbursts: More likely with large pupils or high prescriptions; reduced with modern technology.
- Under- or over-correction: May require an enhancement; rates are generally below 5%.
LASIK-specific risks
- Flap complications: Rare but unique to LASIK, especially after eye trauma or contact sports.
- Earlier dry eye: Higher risk than PRK or SMILE during the first 3–6 months.
PRK-specific risks
- Corneal haze: Temporary cloudiness, reduced with mitomycin-C.
- Longer discomfort window: Surface healing causes 2–3 days of significant sensitivity
SMILE-specific risks
- Technique-sensitive: Outcomes depend more on surgeon experience.
- Harder enhancements: Touch-ups are less straightforward than LASIK.
- Lowest dry eye risk: Consistently seen in large clinical studies.
Who is a good candidate?
Candidacy is determined by a comprehensive pre-operative assessment. General eligibility criteria that apply to all three procedures:
- Age 18 or older (21+ preferred for full prescription stability)
- Stable prescription for at least 12 consecutive months
- Sufficient corneal thickness (procedure-specific thresholds apply)
- No active keratoconus, progressive corneal disease, or uncontrolled autoimmune conditions
- Not currently pregnant or nursing (hormonal fluctuations affect refraction)
Which procedure fits your profile? Quick-match guide: Fastest recovery possible → LASIK Thin corneas or moderate dry eye → PRK or SMILE Contact sports / military / first responder → PRK or SMILE (no flap risk) Lowest dry eye risk is the priority → SMILE Hyperopia (farsightedness) → LASIK or PRK (SMILE does not yet fully treat hyperopia) Budget is the primary driver → PRK is typically the most affordable |
Frequently asked questions
Is laser eye surgery painful?
No. Numbing drops ensure a painless surgery, which takes just 10–15 minutes per eye. Post-op discomfort is minimal for LASIK and SMILE, while PRK patients typically experience moderate soreness and light sensitivity for 2–3 days.
Are the results permanent?
Yes, the corneal reshaping is permanent, and long-term results are equally excellent across all three procedures. However, natural age-related vision changes, like needing reading glasses after 40, will still occur over time.
Which procedure gives the best long-term vision?
All three deliver equally excellent long-term vision. The differences lie in recovery times and eligibility, not the final result.
Can I have laser surgery if I have astigmatism?
Yes. LASIK, PRK, and SMILE all correct astigmatism. LASIK and PRK treat a broad range of both myopic and hyperopic astigmatism, while SMILE currently focuses on myopic astigmatism.
How do I choose between LASIK, PRK, and SMILE?
Through a comprehensive pre-operative exam. Your surgeon will determine which procedures your eyes safely qualify for and help you choose the best match for your lifestyle.
Does LASIK MD perform all three procedures?
Yes. Our surgeons are expertly trained to perform LASIK, PRK, and SMILE using the latest laser technology across all Canadian clinics.
Ready to find out which procedure is right for you?
Get a free, 30-minute consultation at LASIK MD, Canada's largest vision correction network. We’ll confirm your candidacy and find the best procedure for your lifestyle and budget. No pressure, no obligation.
Author: Mina Mazumder, Content & Communications Specialist
Medical disclaimer:
This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment of any medical condition.