- Medically Reviewed by Mr Mfazo Hove Consultant Ophthalmologist
- Author: Chris Dunnington
- Published: July 5, 2025
Laser eye surgery has transformed the lives of millions, offering freedom from glasses and contact lenses. However, one of the most common side effects after vision correction is dry eyes. If you are considering laser eye surgery, understanding the differences in dry eye risk between SMILE and LASIK is essential. At Blue Fin Vision® Eye Clinic, our top-rated team of leading surgeons and specialists in London provides expert guidance, advanced technology, and personalised care to ensure the best possible outcomes for every patient.
Understanding Dry Eyes After Laser Eye Surgery
Dry eyes occur when the eyes do not produce enough tears or the tears evaporate too quickly, leading to discomfort, blurred vision, and a gritty sensation. After laser eye surgery, temporary dry eyes are common as the corneal nerves responsible for tear production are affected during the procedure. The degree and duration of dryness can vary depending on the surgical technique used.
LASIK: How It Works and Its Impact on Dry Eyes
LASIK (Laser-Assisted In Situ Keratomileusis) is one of the most widely performed laser eye surgery procedures. During LASIK, a thin flap is created on the surface of the cornea. The underlying tissue is then reshaped with an excimer laser, and the flap is repositioned to heal naturally.
Key Points:
- The creation of the corneal flap severs a significant number of corneal nerves.
- These nerves are crucial for signalling tear production.
- As a result, almost all LASIK patients experience increased dryness in the weeks following surgery.
- Most patients notice improvement as the nerves regenerate, but a small percentage may have persistent symptoms beyond six months.
- The risk of long-term dry eyes after LASIK is estimated at around 5–10 percent, especially in those with pre-existing dryness or high prescriptions.
SMILE: How It Differs and Its Effect on Dry Eyes
SMILE (Small Incision Lenticule Extraction) is a newer, minimally invasive laser eye surgery technique. Instead of creating a large flap, SMILE uses a femtosecond laser to create a small, lens-shaped piece of tissue (lenticule) within the cornea, which is then removed through a tiny keyhole incision.
Key Points:
- SMILE does not require a large corneal flap, so fewer corneal nerves are disrupted.
- This preservation of nerve integrity means the feedback loop for tear production is less affected.
- Clinical evidence and patient experience suggest SMILE is associated with a lower risk and shorter duration of dry eye symptoms compared to LASIK.
- Most SMILE patients experience mild, short-lived dryness that improves as healing progresses.
Why Does SMILE Cause Less Dry Eye Than LASIK?
- Nerve Preservation: SMILE’s small incision technique spares more corneal nerves, maintaining better tear production and ocular surface sensation.
- Reduced Surface Disruption: The absence of a large flap means less trauma to the corneal surface, resulting in a more stable tear film.
- Faster Nerve Recovery: The smaller incision allows for quicker nerve regeneration, so symptoms resolve more rapidly.
What the Evidence Shows
- LASIK: Higher risk of moderate to severe dry eyes in the early weeks and months after surgery. Some patients may require ongoing use of lubricating eye drops or further treatment.
- SMILE: Lower incidence and severity of dry eye symptoms. Most patients report only mild discomfort, with a faster return to normal tear function.
Managing Dry Eyes After Laser Eye Surgery
At Blue Fin Vision® Eye Clinic, our Harley Street team of top doctors and leading surgeons prioritise your comfort and long-term eye health:
- Comprehensive Pre-Operative Assessment: Every patient is screened for dry eye risk factors. Pre-existing dry eye is identified and treated before surgery.
- Personalised Procedure Selection: We recommend the most suitable laser eye surgery technique for your eyes, lifestyle, and visual needs.
- Advanced Technology: Our clinic uses the latest diagnostic and surgical platforms to ensure precision, safety, and the best possible outcomes.
- Tailored Aftercare: We provide detailed aftercare plans, including lubricating drops and regular follow-up, to support your recovery and comfort.
Why Choose Blue Fin Vision® Eye Clinic in London?
- Top-Rated, Leading Surgeons: Our Harley Street clinic is home to some of the UK’s most experienced and respected laser eye surgeons and specialists.
- Best Practice Standards: We adhere to the highest standards of safety, patient care, and clinical excellence.
- Personalised, Compassionate Care: Every patient receives a bespoke treatment plan and individual support throughout their journey.
- Outstanding Results: Our commitment is to deliver the best possible vision and quality of life for every patient.
Take the Next Step Towards Clear, Comfortable Vision
If you are considering laser eye surgery and want to minimise your risk of dry eyes, trust your vision to the top specialists at Blue Fin Vision® Eye Clinic. Book your consultation at our Harley Street, London clinic and experience the difference that expert care, advanced technology, and personalised support can make.
Your vision deserves the best – choose Blue Fin Vision® for the safest, most advanced laser eye surgery and compassionate aftercare. Contact us today to begin your journey to clearer, more comfortable sight.
