What is Advanced Laser Refractive Surgery?
Advanced Laser Refractive Surgery is a modern eye procedure that uses laser technology to correct vision problems like myopia, hyperopia, and astigmatism. It reshapes the cornea with high precision, reducing or eliminating the need for glasses or contact lenses.
Advanced Laser Refractive Surgery in India: Understanding the Procedure and Treatment
Spend any time in an Indian city and the number of people wearing glasses is striking. Refractive errors are extraordinarily common here, driven partly by genetics, partly by urbanisation, and partly by the reading-heavy demands placed on children from a young age. A 2015 global study put the number of people living with uncorrected or under-corrected refractive errors at over 550 million, and India accounts for a very significant share of that figure.
What has changed over the past decade is access. Advanced excimer and femtosecond laser platforms, once found only in a handful of private hospitals, are now available across major cities including Chennai, Hyderabad, Mumbai, Delhi, and Bangalore. Procedure costs in India are substantially lower than in most Western countries, which has made surgery a realistic option for a much wider group of patients.
At leading eye hospitals, every patient interested in laser surgery goes through a detailed pre-operative workup before any recommendation is made. Corneal thickness (pachymetry), corneal topography, wavefront aberrometry, and a full dilated eye examination are all part of the process. Plenty of patients who come in hoping for surgery find they are not suitable candidates, and it is far better to know that before the procedure than after.
Types of Advanced Laser Refractive Surgery Available in India
Each procedure uses laser energy differently. The right choice depends on corneal thickness, lifestyle, prescription range, and how much risk of certain side effects a patient is willing to accept:
| Procedure | How It Works | Key Advantage | Who It Suits |
|---|---|---|---|
| LASIK | Flap creation followed by excimer laser reshaping of the stroma | Fast recovery, minimal discomfort | Myopia, hyperopia, astigmatism within range |
| Femto LASIK | Bladeless femtosecond flap with excimer laser reshaping | More consistent flap than microkeratome | Patients preferring a fully bladeless approach |
| Contoura LASIK | Topography-guided excimer treatment | Corrects corneal surface irregularities beyond the prescription | Irregular corneal topography |
| PRK / TransPRK | No flap; epithelium removed before laser ablation | No flap-related risks; suits thinner corneas | Thin corneas, patients in contact sports |
| SMILE | Flapless; lenticule extracted through a small incision | Minimally invasive, preserves corneal integrity | Myopia and astigmatism |
| SILK | Newer flapless femtosecond procedure | Minimal corneal disruption | Myopia patients wanting the latest technology |
Advanced Laser Refractive Surgery: How the Procedure Works
The underlying principle across all laser refractive procedures is the same: remove a calculated amount of corneal tissue to change how the eye bends light. The surgical route to achieving that varies considerably depending on which procedure is chosen.
LASIK and Femto LASIK both begin with creating a thin flap of corneal tissue. In standard LASIK, a microkeratome blade is used. In Femto LASIK, a femtosecond laser creates the flap instead, which tends to be more uniform in thickness and diameter. Once the flap is folded back, an excimer laser ablates the exposed corneal stroma to the planned depth and shape. The flap is then laid back into position, where it reattaches on its own within minutes. No sutures are needed.
PRK and TransPRK take a different route altogether. There is no flap. The outer epithelial layer of the cornea is removed first, and the excimer laser works directly on the surface. The epithelium grows back over about a week. Recovery is slower than LASIK during this period, but because no flap is created, the procedure suits patients with thinner corneas and carries no flap-related risks.
SMILE is quite different from both. A femtosecond laser creates a small disc of tissue (a lenticule) inside the corneal stroma without ever breaking the surface. The surgeon then removes this lenticule through a tiny arc-shaped incision, and the change in corneal shape corrects the refractive error. No flap is involved at any stage, which makes it the least disruptive of the main procedures in terms of corneal surface integrity.
When is Advanced Laser Refractive Surgery Necessary? Signs You Need Treatment
Laser refractive surgery is elective. Nobody needs it to preserve their sight; it is chosen by people who want to reduce or eliminate their reliance on glasses or contact lenses. That said, good candidacy criteria exist and they matter. Suitable patients generally have:
- A stable spectacle prescription for at least one year before surgery
- Myopia up to around -10.00 D, hyperopia up to +4.00 D, or astigmatism up to -5.00 D (limits vary by procedure and corneal thickness)
- Sufficient corneal thickness to allow safe tissue removal while leaving an adequate residual bed
- Age of 18 years or above, with many surgeons preferring to wait until 21 or older
- No keratoconus, significant dry eye disease, autoimmune conditions affecting healing, or other contraindications
Patients who do not meet these criteria are not turned away carelessly; they are guided toward alternatives such as phakic IOL implantation, which may suit those with very high prescriptions or thin corneas. The consultation is the place to get an honest answer about what is and is not possible.
Advanced Laser Refractive Surgery: Step-by-Step Procedure
- Initial consultation: Corneal topography, pachymetry, wavefront aberrometry, and a full dilated eye examination are performed to assess suitability.
- Pre-operative preparation: On the day of surgery, the eye is cleaned, anaesthetic drops are instilled, and the patient is positioned under the laser system.
- Laser treatment: The relevant steps are carried out depending on the chosen procedure (LASIK, SMILE, PRK, etc.).
- Treatment duration: The active laser time is typically 20 to 60 seconds per eye. Total time in the operating room is around 10 to 20 minutes per eye.
- Immediate post-operative period: Vision may be hazy straight after. The patient rests for 30 minutes and in most LASIK cases vision begins to clear noticeably during this time.
- Discharge: The patient leaves with prescribed eye drops and protective goggles.
How Much Does Advanced Laser Refractive Surgery Cost in India?
Costs vary substantially depending on the procedure, the technology used, and the city and hospital. The figures below give a working range for both eyes:
| Procedure | Approximate Cost (INR, both eyes) |
|---|---|
| LASIK | ₹25,000 – ₹50,000 |
| Femto LASIK | ₹45,000 – ₹80,000 |
| Contoura LASIK | ₹60,000 – ₹1,00,000 |
| TransPRK / No-Touch LASIK | ₹40,000 – ₹75,000 |
| SMILE | ₹70,000 – ₹1,20,000 |
| SILK | ₹80,000 – ₹1,30,000 |
These figures are indicative. Your actual cost depends on prescription strength, the specific laser platform used, and the hospital.
Advanced Laser Refractive Surgery: Post-Surgery Care and Recovery
What to Expect After the Procedure?
Recovery varies quite a bit depending on which procedure was performed. After LASIK or SMILE, the improvement is often dramatic within the first 24 hours. The eyes may feel dry and scratchy, and light sensitivity is common for the first couple of days, but most patients are back to normal activities very quickly.
After PRK or TransPRK, the timeline is longer. The epithelium takes five to seven days to regenerate, and vision is blurry and uncomfortable during that window. Once it heals, vision gradually sharpens, but full stabilisation can take four to six weeks. Night vision and contrast sensitivity sometimes take a little longer to settle, particularly with higher prescriptions.
Post-Operative Care Tips
- Use lubricating drops often in the weeks after surgery, particularly after LASIK where dryness is most noticeable
- Do not rub the eyes under any circumstances for at least four weeks
- Wear protective goggles as prescribed, especially during sleep in the first week
- Stay away from swimming pools, hot tubs, and smoky or dusty environments for three to four weeks
- Complete the full course of antibiotic and steroid drops as prescribed
- Avoid driving until your surgeon confirms both eyes have recovered adequately
- Wear UV-protective sunglasses whenever you are outside
- Keep all follow-up appointments, which are typically at one day, one week, one month, and three months post-operatively
References
Randleman JB, et al. Advances in Laser Refractive Surgery. PMC/NCBI. 2024. https://pmc.ncbi.nlm.nih.gov/articles/PMC11380141/
American Academy of Ophthalmology. LASIK: What to Expect. https://www.aao.org/eye-health/treatments/lasik
Mayo Clinic. LASIK Eye Surgery. https://www.mayoclinic.org/tests-procedures/lasik-eye-surgery/about/pac-20384774
Frequently Asked Questions
Suitability comes down to a few key factors: your age (18 years minimum, ideally older), how stable your prescription has been, how thick your corneas are, and whether you have any conditions that could complicate healing. None of this can be assessed without a proper examination. The pre-operative evaluation at Vasan Eye Care is specifically designed to answer that question for your individual eyes.
The reshaping done to the cornea is permanent. What the surgery cannot prevent is the natural ageing of the eye over the following decades. Presbyopia, which is the reading difficulty that most people notice in their early to mid-40s, happens because of changes in the lens, not the cornea, so laser surgery does not prevent it. Some patients also experience small prescription shifts years after surgery, though this is not universal.
The active laser treatment runs for roughly 20 to 60 seconds per eye. Preparation, positioning, and the post-treatment check add up to about 10 to 20 minutes per eye in total.
Not during the procedure. Anaesthetic drops are used throughout. After LASIK or SMILE, there may be some tearing and sensitivity for a few hours. PRK involves more surface discomfort for four to five days while the epithelium grows back, which is the main reason some patients prefer LASIK despite the flap.
Eighteen years is the standard minimum. In practice, many surgeons prefer to wait until 21 to 25 because prescriptions tend to be more stable by that point. Operating on a prescription that is still changing will not produce a lasting result.
Most degrees of myopia, hyperopia, and astigmatism within the safe treatment range can be corrected. Very high prescriptions or corneas that are too thin to allow adequate tissue removal may make laser surgery unsuitable. In those cases, phakic IOL implantation is often the better alternative.
Dry eyes, glare, halos around lights, and mild sensitivity are the most commonly reported side effects in the first few weeks. They tend to resolve as the eye heals. Serious complications such as infection or flap displacement are uncommon. Your surgeon will go through the specific risks for whichever procedure you are considering.
LASIK creates a flap to access the tissue beneath, uses an excimer laser to reshape it, then replaces the flap. SMILE never creates a flap at all. A femtosecond laser forms a small piece of tissue inside the cornea, which the surgeon then removes through a tiny opening. SMILE is considered gentler on the corneal surface and is often preferred by patients who play contact sports or have jobs involving physical risk to the face.
After LASIK or SMILE, desk work is usually possible within one to two days. After PRK, most people need five to seven days before they feel comfortable in front of a screen. Outdoor work in dusty conditions or heavy physical labour should wait at least two weeks regardless of the procedure.
Most standard health insurance policies do not cover elective refractive surgery. Some corporate health plans and top-up policies are exceptions. It is worth checking directly with your insurer before booking the procedure, as policies differ significantly.
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References
Randleman JB, et al. Advances in Laser Refractive Surgery. PMC/NCBI. 2024. https://pmc.ncbi.nlm.nih.gov/articles/PMC11380141/
American Academy of Ophthalmology. LASIK: What to Expect. https://www.aao.org/eye-health/treatments/lasik
Mayo Clinic. LASIK Eye Surgery. https://www.mayoclinic.org/tests-procedures/lasik-eye-surgery/about/pac-20384774
