Types of LASIK Comparison of Techniques and Benefits
There are several popular types of LASIK, such as PRK, which removes the corneal surface to reshape the cornea; LASIK, which uses a microkeratome blade to create a corneal flap; Femto LASIK, which uses a laser instead of a blade; and ReLEx SMILE, which involves a smaller incision and faster recovery.
LASIK is suitable for people with nearsightedness, farsightedness, or astigmatism, who have a strong and sufficiently thick cornea, and no chronic or severe eye diseases. It is ideal for those who want to reduce their dependence on glasses or contact lenses in daily life.
Choosing the most appropriate LASIK technique depends on your vision condition, corneal structure, and lifestyle. It’s best to consult an experienced ophthalmologist for a personalized evaluation and treatment recommendation.
What Are the Different Types of LASIK?
Vision problems such as nearsightedness, farsightedness, or astigmatism can significantly affect one’s quality of life. LASIK has become a popular and effective solution for permanent vision correction.Today, there are various LASIK technologies — each with its unique principles, advantages, limitations, and costs.This article explores how many types of LASIK there are, comparing each method’s pros and cons and helping you choose the best technique for your eye condition, budget, and lifestyle.
Main Types of LASIK Surgery
LASIK technologies have evolved continuously to meet different vision correction needs. Each type works differently and has its own benefits and precautions:
1. PRK (Photorefractive Keratectomy)
The earliest LASIK method. The surgeon removes the outer corneal surface before reshaping the cornea with a laser. The surface gradually regenerates.Pros: No risk of flap displacement; suitable for thin corneas or people with high-impact activities.Cons: Longer recovery (3–5 days of discomfort or blurred vision).
2. TransPRK
An advanced form of PRK using Excimer laser to remove the epithelium and reshape the cornea in one step — without touching the eye directly.Pros: No flap creation; ideal for thin corneas.Cons: Similar recovery time to PRK; may cause temporary discomfort.
3. Standard LASIK
Traditional LASIK using a microkeratome blade to create a corneal flap, then reshaping with a laser.Pros: Fast recovery, minimal pain.Cons: Possible flap displacement if the eye is hit within 1–3 months.
4. FemtoLASIK (Femtosecond LASIK)
An upgraded version of standard LASIK using a Femtosecond laser instead of a blade to create the flap.Pros: More precise, safer, smoother flap surface, faster healing.Cons: Still carries minor flap displacement risk.
5. ReLEx SMILE
Uses a Femtosecond laser to create a small tissue lenticule, which is removed through a 2–4 mm incision — no flap creation.Pros: Tiny incision, faster recovery, lower dry-eye risk, better corneal stability.Cons: Suitable only for myopia and astigmatism (not presbyopia).
6. SMILE Pro®
The most advanced and comfortable LASIK technology today, using high-speed laser correction — only 8 seconds per eye.Pros: Fast, accurate, less anxiety during the procedure.Cons: Applicable for myopia and astigmatism only.
7. NanoLASIK
An enhanced all-laser LASIK using low-energy femtosecond laser and AI-assisted scanning for higher precision.Pros: Painless, accurate, safe, effective for myopia, hyperopia, and astigmatism.
8. NanoReLEx®
Uses next-gen femtosecond laser with AI + real-time OCT scanning, creating and removing corneal tissue via a small incision (~2 mm).Pros: Extremely precise, safest option, quick recovery.Cons: Suitable for myopia and astigmatism only.
9. NV LASIK
Designed for presbyopia correction, using blended vision — one eye is corrected for distance, the other slightly nearsighted for near focus.Pros: Reduces dependency on reading glasses.Cons: Requires a short adaptation period.
10. Nano NV LASIK
An advanced form of FemtoLASIK using ultra-fast femtosecond laser (nanojoule energy) for smooth corneal separation and rapid recovery.Pros: Enhances both near and distance vision for presbyopia; minimal discomfort.Cons: May slightly reduce contrast sensitivity.
Comparison Table: Types of LASIK
Type
Principle
Advantages
Precautions
PRK
Removes surface layer before reshaping cornea
No flap, suitable for thin corneas
Slower recovery, discomfort
TransPRK
Laser removes surface and reshapes in one step
Touch-free, no flap
Slower recovery
Standard LASIK
Blade creates flap, laser reshapes
Fast recovery
Flap may shift with impact
FemtoLASIK
Laser creates flap, no blade
High precision, safer
Minor flap risks
ReLEx SMILE
Laser creates small lenticule, removed via tiny incision
Small incision, quick recovery
Limited to myopia/astigmatism
SMILE Pro®
Fast femtosecond laser (8 sec/eye)
Quick, comfortable
Myopia/astigmatism only
NanoLASIK
Low-energy laser, AI precision
Safe, accurate
Slight risk if impacted early
NanoReLEx®
AI-assisted femtosecond laser, OCT scan
Highly precise, safest
Myopia/astigmatism only
NV LASIK
Blended vision correction
See near & far
Needs short adjustment
Nano NV LASIK
Nano-energy laser for presbyopia
Fast recovery, smooth
May reduce image sharpness
Who Is a Good Candidate for LASIK?
LASIK is effective but not suitable for everyone. Ideal candidates should:
Be 18 years or older
Have stable vision for at least 1 year
Have sufficient corneal thickness
Have no severe eye diseases (e.g., glaucoma, cataracts)
Have no uncontrolled medical conditions (e.g., diabetes)
Pre-LASIK Preparation
Stop wearing contact lenses before surgery
Wash your face and hair thoroughly
Avoid makeup and wear front-button clothing
Do not use perfume or deodorant sprays
Avoid alcohol the day before
Inform your doctor of all medications
Do not drive on the day of surgery — have someone accompany you
Post-LASIK Care and Precautions
Do not rub your eyes
Avoid getting water in your eyes
Do not swim or dive until cleared by your doctor
Avoid eye makeup for at least 2 weeks
Use prescribed eye drops strictly
Wear protective eye shields while sleeping for 1 week
Rest your eyes regularly when using screens
How Much Does LASIK Cost?
Costs vary by technology. A comprehensive eye evaluation at Bangkok Eye Hospital can help determine the most suitable technique and estimate the total cost, including aftercare and insurance options.
Conclusion
How many types of LASIK are there?There are several — such as PRK, LASIK, Femto LASIK, and ReLEx SMILE, each differing in technology, incision size, and recovery time.Choosing the right LASIK method requires professional evaluation to ensure safety, accuracy, and long-term results.Bangkok Eye Hospital offers modern technology and specialized eye care to help you achieve clearer vision confidently.
FAQs About LASIK Types
1. Can I undergo another LASIK procedure with a different technique?Yes, but it depends on your corneal condition and previous method. For example, if you previously had LASIK with a flap, your surgeon may reopen it for enhancement. PRK retreatment is also possible for certain cases.
2. Does the LASIK type affect recovery time?Yes. PRK typically takes several days to a week for recovery, while LASIK, Femto LASIK, and ReLEx SMILE allow clear vision within 1–3 days.
3. Which LASIK technique is best for me?It depends on your vision type, corneal thickness, lifestyle, and budget. Consulting a specialized ophthalmologist is essential for finding the most suitable and effective option.