LASIK Surgery
How LASIK Works
This section explains the main steps of the LASIK procedure and how a laser reshapes the cornea to improve vision by focusing light more accurately onto the retina.
A thin flap is created on the cornea using a femtosecond laser or a microkeratome. The flap is carefully lifted to expose the inner corneal tissue, which allows for controlled reshaping while keeping the upper corneal layer intact for faster healing and reduced discomfort.
An excimer laser delivers cool pulses of ultraviolet light to remove microscopic amounts of corneal tissue. Each pulse is carefully measured to match your unique prescription, changing how light rays focus on the retina. This process typically takes less than a minute per eye.
Once the cornea is reshaped, the thin flap is gently laid back over the treated area where it adheres naturally without the need for stitches. This secure placement protects the eye and aids in rapid healing, with most patients noticing improved vision within 24 hours.
Modern LASIK systems include sophisticated eye-tracking features that monitor eye movement in real time during the procedure. This ensures that laser pulses are precisely targeted, even if the eye moves slightly, which enhances the safety and accuracy of the surgery.
Wavefront technology allows surgeons to create a detailed 3D map of your eye's unique imperfections. This map guides the laser to deliver a fully customized treatment, potentially improving outcomes by reducing higher-order aberrations that affect night vision and contrast sensitivity.
Candidates for LASIK
Not everyone is a good candidate for LASIK. This section covers the main factors that determine suitability for the procedure to ensure safety and optimal results.
Patients must typically be at least 18 years old, though some surgeons prefer patients to be over 21. Your vision prescription should be stable for at least one year to ensure predictable and lasting results after surgery.
LASIK treats nearsightedness, farsightedness, and astigmatism. Your eligibility depends on the degree of your refractive error being within safe treatment limits. Patients with very high prescriptions may require alternative treatments.
Measuring corneal thickness is critical to ensure enough tissue remains after reshaping to maintain corneal strength. Thin or unusually shaped corneas may not be suitable for LASIK, prompting consideration of alternatives such as PRK or implantable lenses.
Ideal candidates should have healthy eyes free from active infections, inflammation, or severe dry eye. Pre-existing conditions such as glaucoma, cataracts, or keratoconus must be carefully evaluated and managed before considering surgery.
Patients should have a clear understanding of the benefits and limitations of LASIK. While most experience significant vision improvement, factors like age-related changes and individual healing can affect long-term results.
Your occupation and hobbies may impact your candidacy. Individuals involved in contact sports or jobs with a high risk of eye injury should discuss protective measures and suitability with their surgeon.
Benefits and Risks
This section highlights the common benefits and potential risks of LASIK surgery to help you make an informed decision about your vision.
Common advantages of LASIK include:
- Improved vision: About 95% of patients achieve 20/20 vision or better after surgery.
- Quick recovery: Most patients return to normal activities within 24 to 48 hours.
- Long-term results: Vision correction is usually stable for many years, though natural changes may occur with aging.
- Reduced dependency: Many patients enjoy freedom from glasses and contacts, which improves comfort and convenience.
- Enhanced quality of life: Patients often experience improved confidence, especially during activities like sports and driving.
While rare, these complications can occur after LASIK:
- Dry eyes: Temporary dryness and discomfort may last several months and can be managed with artificial tears.
- Glare and halos: Some patients notice glare or halos around lights, especially at night; these symptoms typically improve over time.
- Under- or overcorrection: A small number of patients may require an enhancement surgery to refine their vision.
- Flap complications: Irregular healing or displacement of the corneal flap is uncommon but can affect vision and may require intervention.
Preparing for LASIK
Proper preparation is essential for a smooth LASIK experience. This section outlines key steps to take before surgery to optimize safety and effectiveness.
Contact lenses alter the corneal shape, which can affect surgical measurements. Soft contact lenses should be removed at least one week before your evaluation, while hard or gas-permeable lenses may require removal for up to four weeks.
A detailed eye exam will include measuring corneal thickness, mapping the corneal surface (topography), and checking pupil size. These accurate measurements are critical for creating a custom treatment plan for a safe and effective surgery.
You cannot drive immediately after the procedure, so it is important to have someone available to take you to and from your appointment. Picking up prescribed medications before surgery day also helps ensure a smooth recovery.
Inform your eye care team of all medications, allergies, and medical conditions. Some medications may need to be paused before surgery to reduce risk. Sharing a complete health history helps prevent complications and supports safe, personalized care.
What to Expect During and After Surgery
This section guides you through the LASIK procedure day and the recovery period to set proper expectations and support optimal healing.
Numbing eye drops are applied to ensure your comfort. A small device gently holds your eyelids open while the laser system creates the corneal flap and reshapes the tissue based on your personalized treatment plan. The procedure takes about 10–15 minutes for both eyes.
After surgery, you will rest in a recovery area for about 15–30 minutes. Your vision may be blurry or hazy at first. Protective shields or goggles are worn overnight to prevent you from rubbing your eyes and to protect them as they begin to heal.
Follow-up visits are scheduled within 24–48 hours, at one week, and at one month to monitor healing. You will be prescribed eye drops to prevent infection, manage inflammation, and relieve dryness. Regular check-ups ensure your cornea heals correctly and your vision remains stable.
Temporary side effects like dry eye or light sensitivity usually resolve within weeks to months. If symptoms persist, additional therapies such as punctal plugs, lubricating ointments, or other medications may be recommended to improve your comfort and visual outcome.
FAQs
Below are answers to common questions patients ask about LASIK surgery to help you make an informed decision.
The laser treatment itself takes only a few minutes per eye, while the entire appointment usually lasts about two hours. Most patients experience significant vision improvement within 24 hours and can resume normal activities, with a full recovery typically in one to three days.
Numbing eye drops ensure there is little to no pain during the procedure, though you may feel slight pressure. Mild discomfort, tearing, or a scratchy feeling is common afterward and usually resolves within a few days with prescribed eye drops.
Temporary dry eyes, glare, and halos are the most common side effects, which typically improve within weeks to months. Management includes artificial tears and lubricating ointments. Rare flap issues or regression may require an enhancement surgery.
Standard LASIK does not directly reverse presbyopia, which is age-related near vision loss. Options to address this include monovision LASIK, where one eye is corrected for distance and the other for near vision, or other advanced lens procedures.
LASIK provides permanent corneal reshaping, and most patients maintain clear vision for many years. Natural age-related changes like presbyopia or cataracts can still occur. Annual eye exams help monitor vision, and minor enhancements can be performed if needed.
Patients with very thin corneas, unstable prescriptions, severe dry eye, or certain autoimmune diseases are often advised against LASIK. Alternative treatments include PRK (surface ablation), SMILE (small incision lenticule extraction), and phakic intraocular lenses.
PRK removes the corneal surface layer without creating a flap and may involve a longer recovery. SMILE uses a small incision to remove tissue without a flap. LASIK combines a flap and reshaping for the fastest visual recovery and minimal discomfort.
Most insurance plans consider LASIK elective and do not cover it. However, you can use a Flexible Spending Account (FSA) or Health Savings Account (HSA). Many practices offer financing plans to help manage the cost.
Next Steps
If you are interested in LASIK, schedule a comprehensive eye exam to determine your candidacy. Discussing your personal vision goals and health history will help us create a tailored treatment plan to achieve the best possible outcome for your vision.