Billions of people worldwide still rely on glasses or contact lenses unnecessarily. Three proven, safe, and highly effective surgical procedures can change that — but the choice between LASIK, CLEAR, and SMILE is one that confuses many patients. Each has distinct advantages, each suits a different candidate profile, and each offers a slightly different post-operative experience. In this article, I will walk you through everything you need to know to understand your options and make an informed decision. If you have been wearing glasses or lenses for years and wondering whether you are a candidate for specs removal, this is the guide you need.
The LASIK Era: 25 Years of Proven Safety
LASIK — Laser-Assisted In Situ Keratomileusis — has been performed worldwide since the early 1990s. With over 40 million procedures completed globally, it is the most studied elective surgical procedure in human history. Its safety profile is extraordinary: serious complications occur in fewer than one in a thousand cases in the hands of experienced surgeons with appropriate pre-operative screening. The track record of LASIK is its single greatest advantage. Decades of follow-up data exist, long-term stability is well-documented, and the procedure's mechanics are understood in exquisite detail.
Modern LASIK at BMH Chandigarh is blade-free — we use a femtosecond laser to create a thin corneal flap with micron-level precision, eliminating the variable of a mechanical microkeratome blade entirely. The procedure takes approximately 10 minutes per eye and delivers results that the vast majority of patients describe as life-changing.
How Blade-Free LASIK Works
The cornea — the clear dome at the front of the eye — is responsible for approximately two-thirds of the eye's total focusing power. In myopia (short-sightedness), hyperopia (long-sightedness), and astigmatism, the cornea's curvature does not perfectly focus light onto the retina. LASIK corrects this by permanently reshaping the corneal stroma — the middle layer of the cornea — using an excimer laser that removes tissue with sub-micron accuracy.
The procedure has two steps. First, a femtosecond laser (emitting ultrashort pulses of near-infrared light) creates a precise, thin corneal flap — typically 90 to 110 microns thick. This flap is gently lifted to expose the corneal stroma underneath. Second, an excimer laser, guided by the patient's precise refractive data mapped from their pre-operative corneal scan, reshapes the stroma by ablating (vaporising) microscopic amounts of tissue. The flap is then repositioned, where it adheres naturally without sutures. The entire laser time is typically 30 to 60 seconds per eye.
CLEAR: Corneal Lenticule Extraction Refractive — The Flapless Future
CLEAR (Corneal Lenticule Extraction Refractive) represents the next generation of corneal refractive surgery. Unlike LASIK, CLEAR does not create a flap at all. Instead, a femtosecond laser is used to create a precisely shaped disc of corneal tissue — called a lenticule — within the intact cornea. This lenticule is then extracted through a small peripheral incision (approximately 2–4mm), and because the lenticule has been removed, the cornea changes shape in exactly the way needed to correct the refractive error.
The absence of a flap is clinically significant in several ways. The corneal surface remains structurally intact — the epithelium, Bowman's layer, and the superficial stroma are all undisturbed over the central optical zone. This means there are no flap-related complications (dislodgement, striae, interface debris), and the cornea retains significantly more of its original biomechanical strength. For patients with active lifestyles — combat sports, swimming, contact sports, military service — CLEAR offers a substantial safety advantage because there is no flap to be displaced by a blow to the eye.
The other major advantage of CLEAR over standard LASIK is dry eye. Flap creation in LASIK severs corneal nerve fibres that run radially from the periphery to the centre, including the sub-basal nerve plexus that is responsible for much of the eye's sensory feedback and reflex tear production. This nerve disruption is the primary cause of post-LASIK dry eye — a real and sometimes persistent problem that affects a proportion of LASIK patients. CLEAR's smaller, peripheral incision preserves the vast majority of these nerve fibres, resulting in significantly lower rates and severity of post-operative dry eye. For patients who already have borderline dry eyes or work in air-conditioned environments (which describes a large proportion of Chandigarh's professional population), this is an important consideration.
SMILE: Small Incision Lenticule Extraction — The Keyhole Approach
SMILE (Small Incision Lenticule Extraction) uses a similar lenticule extraction concept to CLEAR but through an even smaller incision — typically 2–3mm — making it the most minimally invasive of the three procedures. SMILE was the pioneering flapless procedure and has accumulated an impressive body of clinical evidence since its widespread adoption in the early 2010s. It offers excellent refractive predictability for myopia and myopic astigmatism, though its correction range for hyperopia is more limited than LASIK.
The key distinction between SMILE and CLEAR at BMH relates primarily to the specific laser platform used and subtle technical differences in lenticule creation and extraction technique. Both offer the core benefit of flapless surgery — preserved corneal biomechanics, reduced dry eye risk, and greater suitability for active lifestyles. For eligible candidates, both are excellent choices and the decision is often guided by the specific refractive error, corneal parameters, and the surgeon's technical preference based on intraoperative anatomy.
Comparison at a Glance
| Feature | LASIK (Blade-Free) | CLEAR | SMILE |
|---|---|---|---|
| Procedure type | Flap + excimer laser ablation | Flapless lenticule extraction | Flapless lenticule extraction |
| Incision size | Full corneal flap (~18mm arc) | 2–4mm peripheral incision | 2–3mm peripheral incision |
| Dry eye risk | Moderate (nerve disruption) | Low (nerves largely preserved) | Low (nerves largely preserved) |
| Visual recovery | Very fast (1–2 days) | Slightly slower (3–5 days) | Slightly slower (3–5 days) |
| Corneal biomechanics | Moderately reduced | Best preserved | Best preserved |
| Ideal for | Most candidates, fastest recovery | Active lifestyle, dry eyes, thin corneas (relative) | Active lifestyle, premium experience |
| Range of correction | Myopia, hyperopia, astigmatism | Myopia and astigmatism (primary) | Myopia and myopic astigmatism |
| Available at BMH | Yes | Yes | Yes |
BAWEJA MULTISPECIALITY HOSPITAL
Free LASIK Consultation at BMH Chandigarh
Comprehensive corneal mapping, pachymetry, topography, and dry eye assessment — all in one visit. Dr. Varun Baweja will recommend the right procedure for your eyes.
How to Choose: A Decision Guide
Which procedure suits you?
The decision guide above is a starting framework, not a final prescription. Every patient's corneal anatomy is unique, and the recommendations from Dr. Baweja following your full pre-operative assessment take absolute precedence over any general guidance. It is entirely possible that a patient who expects to be a CLEAR candidate turns out to have corneal topography better suited to LASIK, or vice versa. This is exactly why the consultation exists.
The Consultation Process at BMH
No vision correction surgery at BMH is offered without a comprehensive pre-operative work-up. The assessment typically takes 60 to 90 minutes and includes:
- Corneal topography: A 3D map of your corneal surface identifying any irregularities (including early keratoconus, which is an absolute contraindication to laser surgery).
- Pachymetry: Precise measurement of corneal thickness at multiple points. Sufficient corneal thickness is essential for safe laser ablation with an adequate residual stromal bed.
- Aberrometry: Measurement of higher-order aberrations in your optical system, which inform whether wavefront-guided or topography-guided ablation is preferable.
- Dry eye assessment: Tear film stability, Schirmer's test, and meibomian gland evaluation. Significant pre-existing dry eye may influence the choice of procedure or require pre-treatment before surgery.
- Cycloplegic refraction: Full refractive assessment with pupil dilation to ensure the correction is accurate and stable.
- Pupil size measurement: Particularly relevant in conditions of low light, where a large pupil combined with a small optical zone can cause night glare post-operatively.
What Can Disqualify You?
Not everyone is a suitable candidate for laser vision correction, and at BMH we take this responsibility seriously. The following conditions are contraindications or cause for significant caution:
- Keratoconus: Progressive corneal thinning and ectasia — laser surgery on a keratoconic cornea can accelerate deterioration and cause severe visual loss. This is detected on topography.
- Thin corneas: Below a safe threshold for the planned ablation depth, laser surgery risks post-operative ectasia. In borderline cases, CLEAR or SMILE may be safer than LASIK due to stromal preservation.
- Unstable prescription: Refractive correction must be stable for at least 12 months (preferably 24 months) before surgery. Treating a prescription that is still changing year-on-year will produce results that drift over time.
- Active corneal disease: Herpes simplex keratitis, corneal dystrophies, or active inflammation preclude safe laser treatment.
- Pregnancy and breastfeeding: Hormonal changes affect refraction and corneal hydration, making measurements unreliable. Surgery should be deferred until 3–6 months after breastfeeding has stopped.
- Autoimmune conditions: Conditions such as lupus, rheumatoid arthritis, or Sjögren's syndrome can impair wound healing and worsen dry eye, requiring careful case-by-case evaluation.
Recovery Comparison
Recovery after all three procedures is remarkably fast by any surgical standard. After LASIK, the majority of patients achieve driving-standard vision within 24 hours and return to desk work within one to two days. The flap heals securely within weeks, though protective eyewear for sports is recommended for a month. After CLEAR or SMILE, visual recovery is typically slightly slower — three to five days for functional clarity — because the corneal epithelium adapts to the changed curvature without the flap's controlled healing interface. By one week, the vast majority of patients from all three procedures have achieved their target vision or very close to it. By one month, vision is essentially stable.
In all cases, anti-inflammatory and lubricating drops are prescribed post-operatively, and patients are reviewed at one day, one week, one month, and three months post-surgery. Swimming and contact sports require a brief restriction period (typically two weeks for LASIK flap stability, one week for flapless procedures in terms of infection risk).
Frequently Asked Questions
Is LASIK permanent?
The corneal reshaping achieved by LASIK is permanent — the tissue removed does not regenerate. However, the eye continues to age normally, and presbyopia (the age-related loss of near-focusing ability) typically begins in the mid-40s regardless of prior LASIK. A small percentage of patients also experience minor prescription changes over years, which may occasionally warrant an enhancement procedure. Over 95% of appropriately selected patients maintain excellent distance vision without glasses long-term.
What is the minimum age for laser vision correction?
At BMH we recommend a minimum age of 18 years, with a stable prescription for at least 12 months. In practice, many ophthalmologists prefer patients to be 21 or older, as refractive stability is more reliably established by that age. There is no strict upper age limit, but patients over 40 should be counselled about presbyopia and may be better served by lens-based procedures such as refractive lens exchange.
Can both eyes be treated on the same day?
Yes — bilateral simultaneous treatment (treating both eyes in the same session) is the standard approach at BMH for all three procedures. It is safe, convenient, and allows the patient to recover from both eyes together. The small theoretical risk of treating one eye at a time (in case of an unexpected complication) is outweighed by the practical benefits of simultaneous treatment for the vast majority of candidates.
Is the procedure painful?
All three procedures are performed under topical anaesthetic eye drops, which numb the ocular surface completely. Patients experience pressure sensation during the suction phase of flap or lenticule creation, but no sharp pain. Post-operatively, LASIK patients typically experience a few hours of grittiness, tearing, and photophobia — analogous to having sand in the eye — which resolves with rest and lubricating drops. CLEAR and SMILE patients generally report slightly less immediate discomfort as the corneal surface is largely intact.
What does laser vision correction cost at BMH?
The cost of LASIK, CLEAR, and SMILE at BMH Chandigarh varies based on the procedure chosen, the degree of refractive correction, and whether any premium add-ons (wavefront guidance, topography guidance) are selected. Our team provides a complete, transparent cost breakdown during your consultation. Most vision correction procedures are not covered by standard health insurance, though some corporate group policies may include a contribution. We offer easy EMI options to make treatment accessible.
The Decision Is Yours — But Not Alone
Choosing the right laser vision correction procedure is a decision that deserves careful consideration, expert guidance, and thorough investigation of your own corneal anatomy. The best procedure for you is not determined by what your colleague had or what an internet forum recommends — it is determined by your specific measurements, lifestyle, and visual needs. At Baweja Multispeciality Hospital, every laser vision consultation is conducted personally by Dr. Varun Baweja, drawing on his NHS training and extensive experience. We take the time to ensure you fully understand your options, your candidacy, and what to realistically expect.
If you have been thinking about getting rid of your glasses, there has never been a better time to take the first step. Book a free consultation, get your corneas mapped, and let us tell you exactly which procedure — if any — is right for your eyes. Life without glasses is closer than you think.