What is SILK LASIK?
SILK LASIK (Smooth Incision Lenticule Keratomileusis) is an advanced, minimally invasive laser vision correction procedure that reshapes the cornea with high precision. It is designed to offer smoother corneal surfaces, faster healing, and improved visual quality compared to traditional LASIK techniques.
SILK LASIK in India
The family of flapless refractive procedures keeps growing. SMILE got there first. Then came refinements on the VisuMax platform, and competitors building their own lenticule extraction systems. SILK is one of the newer entries, and it is the one built on Johnson & Johnson’s ELITA femtosecond laser.
SILK stands for Smooth Incision Lenticule Keratomileusis. It is a flapless, keyhole refractive surgery that uses the ELITA femtosecond laser to create a thin lenticule within the cornea, which is then gently removed through a small incision of around two millimetres. By reshaping the cornea through lenticule extraction rather than flap creation plus excimer ablation, SILK LASIK offers a minimally invasive path to correcting myopia and astigmatism.
At Vasan Eye Care, SILK LASIK is offered for eligible patients who want the benefits of a flapless, single-step approach. The procedure is performed entirely on one laser platform, and it is particularly well-suited for patients who prefer the structural advantages of keyhole surgery over flap-based LASIK.
India has seen steady adoption of lenticule-based refractive surgery over the past decade, starting with SMILE and now extending to newer-generation platforms including SILK. The appeal is consistent across the category: preservation of corneal biomechanics, reduced disturbance of corneal nerves, and faster return to routine life than surface ablation procedures like PRK. SILK adds refinements in lenticule smoothness and optical quality, which is especially attractive for patients doing screen-heavy work, in defence roles, or in demanding sporting environments.
Indian centres offering SILK LASIK follow comprehensive screening protocols: corneal topography, tomography, pachymetry, epithelial mapping, aberrometry, and tear film assessment. Candidacy requires stable refraction, adequate corneal thickness, no ectatic disease, and good ocular surface health. None of these are optional checkboxes. A SILK procedure on an unsuitable cornea produces the same kind of regret as any refractive surgery on the wrong eye.
Types of Lenticule Extraction Procedures
SILK is a specific platform, but lenticule extraction techniques as a whole form a small, related family:
| Procedure | Laser Platform | Incision Size | Principal Correction |
|---|---|---|---|
| SILK LASIK | ELITA (Johnson & Johnson) | Around 2 mm | Myopia and astigmatism |
| SMILE | VisuMax (Zeiss) | 2 to 4 mm | Myopia and astigmatism |
| CLEAR | Ziemer Femto LDV Z8 | Around 2 to 3 mm | Myopia and astigmatism |
| SmartSight | Schwind ATOS | Around 2 to 4 mm | Myopia and astigmatism |
How SILK LASIK Works?
The ELITA femtosecond laser is programmed with the patient’s refractive data and delivers very short, low-energy pulses to create a thin, biconvex lenticule within the corneal stroma. A small arcuate incision of around two millimetres is created at the edge of this lenticule. The surgeon then uses a specialised instrument to lift and extract the lenticule through the incision.
Removal of the lenticule changes the corneal curvature, correcting the refractive error. Because no flap is created and only a small incision is made, the structural integrity of the cornea is better preserved than with flap-based LASIK, which may also translate into a reduced risk of post-operative dry eye and the range of flap-related issues that occasionally surface years after LASIK.
When Is SILK LASIK Indicated?
SILK LASIK is considered for patients seeking freedom from spectacles or contact lenses. Common indications include:
- Progressive dependence on glasses
- Contact lens intolerance
- Dry eye tendencies
- Occupational requirements such as defence services or sport
- High visual demand from screens
- Stable refraction for at least one year
Candidacy is confirmed after detailed evaluation. SILK is not suitable for patients with keratoconus, corneas that are too thin for safe lenticule removal, or high hyperopia, because the current indication is myopia with or without astigmatism.
SILK LASIK: Step-by-Step Procedure
- Thorough refractive and corneal workup.
- Treatment plan programmed into the ELITA platform based on refraction, pachymetry, and topography.
- On the day of surgery: topical anaesthetic drops instilled, eye prepared.
- Patient docked to the laser; femtosecond laser creates the intrastromal lenticule and small side incision in one uninterrupted step.
- Surgeon lifts and removes the lenticule through the incision.
- Cornea irrigated gently; antibiotic and lubricating drops applied.
- Patient rests briefly, discharged the same day.
- Follow-ups at day one, one week, one month, three months.
How Much Does SILK LASIK Cost in India?
| Procedure | Indicative Cost Both Eyes (INR) | Typical Inclusions |
|---|---|---|
| SILK LASIK | 1,20,000 to 1,90,000 | Workup, surgery, medications, follow-up visits |
| SMILE | 1,10,000 to 1,80,000 | Complete refractive package |
| Standard LASIK (for comparison) | 50,000 to 90,000 | Standard flap-based LASIK |
Final cost is confirmed at the time of pre-operative counselling.
SILK LASIK: Post-Surgery Care and Recovery
What to Expect After SILK LASIK?
Most patients experience rapid improvement in vision, with functional sight often achievable within 24 to 48 hours. Mild grittiness, light sensitivity, and watering may persist for a few days. Quality of vision improves steadily over the first few weeks as the cornea adapts. Dry eye symptoms, when they occur, are generally milder than with flap-based LASIK because fewer corneal nerves are disturbed during a flapless procedure.
Post-Operative Care Tips
- Apply prescribed antibiotic and lubricating drops on schedule.
- Do not rub the eyes.
- Keep water out of the eyes for at least one week.
- Avoid swimming for three to four weeks.
- Delay eye make-up for two weeks.
- Take screen breaks and blink consciously; screen fatigue slows early healing.
- Wear sunglasses outdoors.
- Avoid contact sports and dusty environments for a month.
- Follow-up visits at day one, one week, one month, and three months track healing carefully.
References
- Johnson & Johnson Vision. ELITA Laser System Technical Information.
- US Food and Drug Administration. ELITA Femtosecond Laser Premarket Approval Documents.
- Reinstein DZ et al. Lenticule Extraction Techniques: Review of Evidence.
- All India Ophthalmological Society. Refractive Surgery Guidelines.
- Indian Journal of Ophthalmology. Lenticule Extraction: Outcomes and Considerations.
Frequently Asked Questions
SILK stands for Smooth Incision Lenticule Keratomileusis. It is a type of lenticule extraction procedure that corrects refractive errors without creating a corneal flap.
Both are flapless lenticule extraction procedures. SILK uses the ELITA platform and features a refined lenticule shape and incision profile, with the aim of smoother extraction and improved visual quality. SMILE uses the VisuMax platform. The underlying logic is similar; the refinements are in the details.
Candidacy depends on refraction, corneal thickness, topography, tear film, and overall ocular health. A full workup is the only reliable way to know.
The procedure is performed under topical anaesthesia. Most patients report pressure or mild discomfort but not pain. Any post-op discomfort is usually mild and short-lived.
The laser portion takes around 30 seconds per eye, and the full surgical visit typically lasts about an hour.
Office work can usually be resumed within two to three days. Jobs involving dust or heavy physical activity may require a longer break.
Yes, generally. Because the procedure is flapless and the small incision limits corneal nerve disruption, dry eye symptoms are typically milder and shorter-lived than with flap-based LASIK. Individual responses vary.
The corneal reshaping is permanent. Age-related changes such as presbyopia and cataract can still develop later, but these are independent of the SILK surgery.
Most patients can drive within two to three days, once vision has cleared adequately and the surgeon has confirmed recovery.
Currently, SILK is primarily approved for myopia with or without astigmatism. Hyperopic treatments may become available as the platform evolves, but for now hyperopia is corrected with other refractive techniques.
References
* Johnson & Johnson Vision. ELITA Laser System Technical Information.
* US Food and Drug Administration. ELITA Femtosecond Laser Premarket Approval Documents.
* Reinstein DZ et al. Lenticule Extraction Techniques: Review of Evidence.
* All India Ophthalmological Society. Refractive Surgery Guidelines.
* Indian Journal of Ophthalmology. Lenticule Extraction: Outcomes and Considerations.
