Precision Grafting for Clear Vision with Femtosecond Laser DALK
FDA Approved
Advanced Technology
At a Glance
Quick facts about Femtosecond Laser DALK to help you understand the basics
- Treatments offered
Femtosecond Laser DALK (partial-thickness corneal transplant)
- Finance
Transparent pricing and full aftercare support; financing options discussed during consultation
- Why Choose
UK pioneer in femtosecond-laser corneal grafts, internationally recognised corneal specialists
- Locations
London, Sussex, Surrey
Key Benefits
- Lower risk of graft rejection
- Reduced chance of endothelial cell loss
- Better long-term graft survival
- Improved structural strength of the cornea
- Greater precision and reproducibility with laser assistance
What is Femtosecond Laser DALK?
Femtosecond Laser DALK (Deep Anterior Lamellar Keratoplasty) is a modern corneal transplant procedure that treats damage in the front and middle layers of the cornea while keeping the healthy inner layer intact, with laser-guided precision ensuring accurate graft positioning and better healing.
This laser-guided “Zag-Square” or “lock-and-key” pattern technique was developed at Centre for Sight and offers a mechanically strong wound, faster visual rehabilitation, and reduced astigmatism compared to manual grafts.
Conditions Treated with Femtosecond DALK
1
Keratoconus
Femtosecond DALK is commonly used in keratoconus to replace the weakened and irregular anterior corneal layers while preserving a healthy endothelium, improving corneal shape and visual quality.
2
Corneal Scarring
In cases of corneal scarring, femtosecond DALK removes scarred stromal tissue and restores corneal clarity without the risks associated with full-thickness corneal transplantation.
3
Corneal Stromal Dystrophies
Femtosecond DALK effectively treats corneal stromal dystrophies by selectively replacing the affected stromal layers while maintaining the patient’s normal endothelial function.
4
Advanced Corneal Thinning with Healthy Endothelium
In advanced corneal thinning where the endothelium remains intact, femtosecond DALK provides structural reinforcement by replacing compromised anterior corneal tissue while maintaining endothelial integrity.
Comparing Transplantation Procedures
Please note that your consultant will recommend the most suitable treatment option tailored to your specific case.
Procedure Type
How it works
Best For
Pros
Cons
Procedure Type
DALK
How it works
Partial-thickness graft; replaces front/middle cornea
Best For
Advanced keratoconus with healthy endothelium
Pros
Lower rejection risk; preserves deeper layers
Cons
Technically complex; may not address full-thickness damage
Procedure Type
FSDALK
How it works
Same graft level as DALK, but with femtosecond-laser assisted incision and donor fit
Best For
Keratoconus needing highest precision
Pros
Improved wound fit; faster visual recovery; reduced astigmatism
Cons
Requires high-specialist skill; potentially higher cost
Procedure Type
PK
How it works
Full-thickness graft replacing all corneal layers
Best For
Severe cases, advanced scarring
Pros
Comprehensive solution for severe damage
Cons
Longer recovery; higher rejection/complication risk
What are the Benefits and Risks of Femtosecond Laser DALK?
Your consultant will provide a personalised risk-and-benefit discussion based on your eye’s specific needs.
Benefits (vary by procedure):
Improved vision clarity and stability
Femtosecond Laser–Assisted Deep Anterior Lamellar Keratoplasty (DALK) replaces the damaged outer layers of the cornea while preserving the healthy inner endothelial layer. This can significantly improve visual clarity in conditions such as keratoconus or corneal scarring.
Lower risk of graft rejection
Because the patient’s own endothelial cells are retained, the risk of immune rejection is generally lower compared with full-thickness corneal transplant procedures.
High surgical precision
The use of femtosecond laser technology allows extremely precise cuts and graft preparation. This can improve the fit between donor and recipient tissue, supporting stronger wound architecture and potentially reducing irregular astigmatism.
Preservation of healthy corneal tissue
By replacing only the diseased corneal layers, DALK maintains more of the eye’s natural structure and function.
Risks/side effects (not exhaustive):
Graft rejection or failure
Although the risk is lower than with full-thickness transplants, graft rejection or failure can still occur and requires monitoring.
Infection or inflammation
As with any surgical procedure, there is a small risk of infection or inflammation following surgery.
Elevated intraocular pressure
Some patients may develop increased eye pressure during recovery, which may require treatment or monitoring.
Suture-related complications
Stitches used during the procedure may occasionally cause irritation, loosen or require adjustment during follow-up care.
Gradual visual recovery
Vision improvement may take several months as the cornea heals and stabilises after surgery.
Not Sure If You're Eligible?
Book a comprehensive eye examination to better understand your vision and available treatment options.
Am I suitable for Femtosecond Laser DALK?
Your consultant will carefully assess your eyes to determine whether Femtosecond Laser–Assisted Deep Anterior Lamellar Keratoplasty (DALK) is the most appropriate treatment for your condition. Suitability depends on the underlying cause of corneal damage, the health of the inner corneal layer, and your overall eye health.
You may be considered for FSDALK if you:
Have conditions affecting the outer layers of the cornea
This includes disorders such as keratoconus, corneal scarring from injury or infection, or certain corneal dystrophies where the deeper endothelial layer remains healthy.
Have reduced vision that cannot be adequately corrected
When glasses, contact lenses or other treatments no longer provide clear or comfortable vision, surgical treatment may be recommended.
Have a healthy endothelial layer
Because DALK preserves the inner lining of the cornea, the procedure is most suitable when the endothelial cells are functioning normally.
Are seeking a partial-thickness transplant option
DALK may be recommended when replacing only the diseased corneal layers is sufficient to restore corneal clarity and shape.
Some factors may affect suitability for Femtosecond Laser DALK, including significant endothelial dysfunction, uncontrolled glaucoma, severe retinal disease, or active infection or inflammation of the eye.
A detailed consultation at Centre for Sight will allow your specialist to examine your eyes, review your medical history and determine whether Femtosecond Laser DALK or another corneal procedure is the most appropriate treatment for you.
Flexible Financing Options
Private Medical Insurance
Many of our consultants work with all of the major insurance providers*
Self Pay
Pay in full for patients who prefer a straightforward approach
0% APR Financing
6-24 month payment plans with approved credit
Military Discount
5% discount for active military and veterans
*Private Medical Insurance is unlikely to cover Laser Eye Surgery, Implantable Contact Lenses, Laser Lens Replacement or any other cosmetic procedures.
FAQs
Below are some of the most frequently asked questions about Femtosecond DALK, helping you understand how the treatment works and whether it may be right for you.
What is femtosecond-assisted DALK and how does it differ from conventional DALK?
Femtosecond-assisted DALK is a partial-thickness corneal transplant procedure in which a femtosecond laser is used to create precise corneal incisions, whereas conventional DALK relies on manual dissection and trephination.
Is femtosecond DALK better than penetrating keratoplasty in terms of visual outcomes and graft survival?
Femtosecond DALK generally provides visual outcomes comparable to penetrating keratoplasty while offering better long-term graft survival and lower rejection risk because the patient’s endothelium is preserved.
What are the main advantages of using a femtosecond laser in DALK surgery?
The main advantages of using a femtosecond laser in DALK include improved precision of wound architecture, better graft-host alignment, increased biomechanical stability, and potentially reduced postoperative astigmatism.
What complications can occur during or after femtosecond DALK?
Complications of femtosecond DALK can include Descemet membrane perforation, conversion to penetrating keratoplasty, interface haze, double anterior chamber formation, and postoperative astigmatism.
What are the visual recovery timeline and long-term outcomes after femtosecond DALK?
Visual recovery after femtosecond DALK typically occurs over several months, with sutures often removed between six and twelve months, and long-term outcomes are generally favourable with stable vision and low endothelial rejection rates.
Have Questions?
Our patient care team is here to answer any questions you may have.
Patient Success Stories
A first class experience
The whole process, start to finish, is first class. The facility at East Grinstead is superb and the staff were friendly and professional. The consultant, Saj Khan, is fantastic, a great communicator as well as being a leader in his work.
I had replacement lenses, after 3 months they became a little cloudy, distorting my vision. This is a known problem. I booked a consultation, within 2 hours I had been assessed and had laser treatment. No fuss, no problem, job done.
Laser Lens Replacement
Richard Black
Lens Replacement with Mr Shahnazaryan
The staff, experience and ultimately the outcome is why I have given this review a 5star. Mr David Shahnazaryans manner and expertise is outstanding. Whilst in the theatre Dr Lam kept me relaxed and comfortable with her kindness and fantastic professionalism. All the staff at CFS from the admin team, reception, clinic and theatre were excellent. I recommend them to everyone.
Laser Lens Replacement
Laser Lens Replacement
karen ryan
Laser lens replacement with trifocal lenses
I had Laser lens replacement with trifocal lenses for both eyes and the results are just amazing. The thorough testing and information I received pre and post operative was excellent. I highly recommend Mr Sheraz Daya who in my opinion is an “eye god” his lovely wife and highly professional team to anyone seeking this type of surgery.
Laser Lens Replacement
Susan Gifford
Professional Actor
5* Lens Replacement Procedure
I had tri focal lens replacement, both eyes done on the same day by Mr Daya. I wish I’d had it done sooner, it’s totally life changing. I researched the procedure for many months and selected Centre for Sight and I’m so glad I did. The whole process is first class from the very first contact, the initial tests could not be more thorough and the procedure is totally painless. The whole team could not be more helpful, I cannot praise them enough. I have perfect all round vision now so if you’re considering having the procedure done then this is definitely the place to choose you won’t regret it
Laser Lens Replacement
Jayne Chandler
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