What is LASIK / SMILE Vision Correction?
LASIK (Laser-Assisted in Situ Keratomileusis) and SMILE (Small Incision Lenticule Extraction) are advanced laser vision correction techniques that permanently alter the shape of the transparent front surface of the eye (the cornea). By precisely reshaping corneal curvature, light rays focus directly onto the retina, correcting refractive errors including Myopia (nearsightedness), Hyperopia (farsightedness), and Astigmatism.
Who Needs LASIK / SMILE Vision Correction?
Laser vision correction is ideal for adults seeking complete freedom from glasses or contact lenses for professional, athletic, or personal reasons.
Key clinical indicators include:
- Stable vision prescription for at least 12 consecutive months.
- Age 18 years or older with no active corneal diseases.
- Intolerance to contact lenses or dry eyes caused by long-term lens wear.
- Active lifestyle or career requirements (e.g., defense, aviation, sports) requiring clear unassisted vision.
- Adequate corneal thickness and healthy corneal topography.
Types of Laser Vision Correction
- Contoura Vision LASIK: Topography-guided LASIK that maps over 22,000 unique elevation points on the cornea for ultra-customized visual outcomes.
- Femto-LASIK (Bladeless LASIK): Uses a femtosecond laser to create a precise thin corneal flap, followed by an excimer laser to reshape underlying tissue.
- SMILE (Small Incision Lenticule Extraction): Flapless, minimally invasive procedure where a femtosecond laser creates a tiny disc (lenticule) inside the cornea, extracted through a 2 mm keyhole incision.
- PRK / Surface Ablation: Flapless procedure where the outer corneal epithelial layer is gently removed prior to laser reshaping; suitable for thinner corneas.
Note on Modality: SMILE is the latest flapless technique that preserves corneal biomechanical strength and minimizes post-operative dry eye symptoms.
Benefits of LASIK / SMILE Vision Correction
- Rapid visual recovery with clear vision often achieved within 24 hours.
- Permanent correction of refractive errors eliminating daily wear of glasses/contacts.
- Completely painless procedure performed under topical numbing drops.
- High satisfaction rate (>96%) with enhanced spatial awareness and peripheral vision.
What to Expect Before Surgery?
Comprehensive corneal evaluation is crucial to confirm candidacy and safety:
- Pentacam / Corneal Topography: 3D mapping of corneal thickness, curvature, and structural integrity to rule out conditions like Keratoconus.
- Dry Eye Assessment: Tear film quality and volume measurements.
- Pupillometry & Refraction: Precise measurement of pupil size and cycloplegic refraction under dilated pupils.
- Contact Lens Holiday: Discontinuing soft contact lenses for 1 week (or rigid lenses for 3 weeks) prior to evaluation.
Complete Procedure
The surgical steps for laser refractive surgery vary by modality:
- Applying anesthetic eye drops to ensure total comfort.
- Positioning a gentle eyelid holder to prevent blinking.
- Flap/Lenticule Creation: A femtosecond laser creates a ultra-thin corneal flap (in Femto-LASIK) or a tiny tissue lenticule (in SMILE).
- Corneal Reshaping: An excimer laser reshapes the corneal curvature in seconds (for LASIK), or the surgeon extracts the lenticule through a 2 mm micro-keyhole (for SMILE).
- Flap Repositioning / Sealing: The flap is gently smoothed back in place (LASIK) or the micro-incision self-seals (SMILE).
- Application of protective lubricating and antibiotic drops.
- Final slit-lamp inspection before discharge.
What to Expect During Surgery?
The actual laser application takes only 10 to 30 seconds per eye, while the entire room procedure takes around 15 minutes for both eyes. You feel slight pressure for a few seconds, but no pain.
Femto-LASIK vs SMILE vs Contoura
| Feature | Femto-LASIK | SMILE Pro | Contoura Vision |
|---|---|---|---|
| Incision Type | Flap created (20 mm) | Keyhole micro-incision (2 mm) | Flap created (20 mm) |
| Corneal Stability | Good | Maximum (Flapless) | Good |
| Dry Eye Risk | Transient dry eyes | Minimal dry eye risk | Transient dry eyes |
| Customization | Standard wavefront | Standard lenticule | Topography-guided (22,000 points) |
| Cost | Mid-Range | Premium | Premium |
Success Rate and Safety
Laser vision correction is one of the most thoroughly studied elective procedures worldwide, boasting a safety profile over 99% and a satisfaction rate exceeding 96%.
LASIK / SMILE Cost Estimate
| Procedure Modality | Cost Range for Both Eyes (INR) |
|---|---|
| Standard Blade LASIK | ₹35,000 - ₹50,000 |
| Femto-LASIK (Bladeless) | ₹60,000 - ₹85,000 |
| Contoura Vision LASIK | ₹80,000 - ₹1,10,000 |
| SMILE / SMILE Pro (Flapless) | ₹1,00,000 - ₹1,40,000 |
Disclaimer: Estimates are for both eyes combined. Pricing varies based on technology platform, hospital setup, and corneal complexity.
Recovery Guide & Post-Operative Care
Recovery Timeline
- Day 1: Clear vision returns; minimal watering or mild light sensitivity.
- Week 1: Resume driving, computer work, and routine indoor activities.
- Month 1: Flap or keyhole incision completely stabilized; full sports and outdoor activities permitted.
Post-Op Precautions & Care
- Eye Protection: Wear dark UV sunglasses outdoors and protective goggles while sleeping for 1 week.
- No Rubbing: Never rub your eyes for at least 1 month post-procedure.
- Water & Makeup Avoidance: Keep water out of the eyes and avoid eye makeup for 2 weeks.
- Prescribed Eye Drops: Use artificial tears and antibiotic/steroid drops as directed.
Frequently Asked Questions
Is LASIK / SMILE procedure permanent?⌄
Yes, laser vision correction permanently alters corneal shape. However, natural age-related changes like reading vision loss (presbyopia) after age 40 can still occur.
Is the laser procedure painful?⌄
No, numbing drops make the entire laser process completely painless. You may only feel mild watering, grittiness, or light pressure for a few hours afterward.
How soon can I return to work or screen time?⌄
Most patients resume light computer work, reading, and normal daily routine within 24 to 48 hours post-procedure.
What is the difference between LASIK and SMILE?⌄
LASIK involves creating a thin corneal flap, whereas SMILE is a flapless, keyhole procedure using a 2 mm micro-incision, leading to greater structural integrity and lower dry eye risk.
Am I a suitable candidate if I have thin corneas?⌄
Patients with thinner corneas may be advised to undergo flapless procedures like SMILE, PRK, or Implantable Collamer Lens (ICL) surgery instead of standard LASIK.