I got my LASIK done over a year ago. Best experience! Walked in with terrible vision and walked out seeing perfectly. Now 20/20 and 20/15. Loved it so much, I’ve convinced 3 friends.
— Katie Steward
LASIK Success Rates and Long-Term Results
LASIK Success Rates: What the Data Shows
Clinical outcomes for LASIK are well-documented, and the numbers are encouraging. Success rates vary based on prescription strength, corneal characteristics, and the technology used.
Rather than quote industry averages, we publish our own outcomes. The results below reflect our patient population using our nomogram with the VISX STAR laser with smooth scan.
- Low myopia, negative 0.50 to negative 3.00 diopters: 97.6 percent reached 20/20 or better, and 100 percent reached 20/40 or better
- Moderate myopia, negative 3.25 to negative 6.00 diopters: 93.2 percent reached 20/20 or better, and 100 percent reached 20/40 or better
- High myopia, negative 6.25 to negative 14.00 diopters: 84.2 percent reached 20/20 or better, and 97.1 percent reached 20/40 or better
These results apply to our patient population only and are not meant to be a standard for treatment. Various studies have been published with better and worse results.
Across our practice as a whole, most of our patients have obtained 20/30 vision or better, or within two lines of their best corrected vision. It is important to note that while vision without correction improves, some patients still need a prescription after LASIK.
Most of the vision correction occurs within the first 24 hours after surgery, and most patients are back to work within one day of the procedure. Vision continues to refine over the following weeks as the cornea heals and stabilizes, and you may notice some improvement or fluctuation as that healing progresses.
The 20/40 standard matters for a practical reason: it is the legal threshold for driving without correction in most states.
The strength of your prescription before surgery is one of the strongest predictors of your outcome, as our own results show. Lower prescriptions require less corneal reshaping and typically produce the most predictable results.
- Mild nearsightedness, up to about negative 3.00 diopters, carries the highest success rates
- Moderate nearsightedness, from negative 3.25 to negative 6.00 diopters, still produces excellent outcomes in most cases
- Higher degrees of nearsightedness can be treated but show more variation in final results
- Regression, where the effect of surgery is gradually lost over several months, is more common in patients who are very nearsighted beyond negative 6.00 diopters, and in many cases significant regression can be retreated
- Low to moderate farsightedness and astigmatism respond very well to modern laser platforms
Patients in their 20s and 30s often have stable prescriptions and healthy corneal tissue, both of which contribute to consistent outcomes. Patients in their 40s and beyond can also achieve excellent results when they are good candidates.
One age-related factor worth knowing about is presbyopia, the natural loss of near-focusing ability that affects everyone. LASIK corrects refractive error but does not prevent presbyopia. In fact, if you are nearsighted and currently remove your glasses to read, correcting that nearsightedness may mean you need reading glasses in your early forties, as most people with normal eyesight do.
For patients over 40, monovision correction, where one eye is optimized for distance and the other for near vision, may help reduce dependence on reading glasses. iDesign 2.0 is the only LASIK platform indicated for monovision LASIK in presbyopic myopic patients. Our surgeons will discuss whether this option suits you during your consultation.
LASIK can effectively address all three common refractive errors, though outcomes vary slightly across them. Nearsightedness (myopia) has the longest research history with consistently high success rates. Farsightedness (hyperopia) responds well, particularly at low to moderate levels.
Astigmatism correction has improved substantially with advanced technologies like iDesign 2.0 and VISX Iris Registration. Iris Registration is a fully automated, touch-free method of aligning the treatment to your eye. It is normal for the pupil to shift position between the moment your eye is measured and the moment of treatment, and Iris Registration centers the treatment correctly regardless of that shift, replacing older methods that required the surgeon to place ink marks on the white of the eye. With iDesign 2.0, more people are candidates for LASIK, including those with higher astigmatism.
An enhancement, sometimes called a touch-up, is an additional laser treatment performed if vision has not fully reached its target after the initial procedure. Enhancement rate is one of the most useful numbers to ask any laser center about, because it reflects three things: experience, attention to detail, and skill. The lower the rate, the less likely a patient will need a second procedure to achieve the desired result.
Our enhancement rate is less than 1.5 percent. Dr. Boutros began performing refractive surgery in 1989, and The Eye Center has performed more than 40,000 vision correction procedures.
For qualified patients, our LASIK lifetime follow-up plan covers enhancements at no additional cost. When an enhancement is performed, it is typically a shorter and simpler procedure than the original surgery. Eligibility depends on remaining corneal thickness, prescription stability, and overall eye health at the time of evaluation.
All-Laser LASIK and Why Flap Creation Matters
LASIK is a two-step procedure. The first step is creating a thin flap in the cornea, and the second is reshaping the tissue underneath with the excimer laser. Most of the complications historically associated with LASIK came from that first step.
The flap can be created either with a microkeratome, a hand-held device with an oscillating metal blade, or with a laser. At The Eye Center, we have abandoned the use of the microkeratome. That technology was appropriate when it was the only option available, but by today's standards we do not consider a metal blade acceptable when laser precision is available.
Only LASIK procedures that use a laser for the first step can accurately be called all-laser. The IntraLase femtosecond laser creates the flap from below the surface using an infrared beam focused inside the cornea, forming a string of tiny 2- to 3-micron bubbles that define the flap's dimensions, beveled edge, and hinge. It never traverses the outer cornea. The process takes approximately 45 seconds.
- Micron-level accuracy more than 100 times greater than a microkeratome
- Reproducible flap thickness within plus or minus 10 microns, compared with variability reported up to plus or minus 40 microns with microkeratomes
- Flap parameters including diameter, depth, hinge location and width can be tailored to each patient
- Fewer enhancement procedures required following LASIK
- In several clinical studies, a significant reduction in dry eye symptoms, the largest showing symptoms reduced by 72 percent
- In a prospective, randomized study, patients who stated a preference preferred the vision in their IntraLase-treated eye 3-to-1 over their blade-treated eye
The greater precision also preserves corneal tissue, which makes customized treatment possible on many thinner corneas that would otherwise require PRK because of an unpredictable flap.
Long-Term Vision Stability After LASIK
Most patients want to know not just whether LASIK works, but how long the results last. Long-term research provides reassuring answers for the right candidates.
The most significant vision changes after LASIK occur during the first few months as the cornea heals and settles. By six months, most patients have reached their stable final outcome. Research shows that vision remains very consistent between six months and five years for patients who were properly screened candidates.
A small percentage of patients may experience minor prescription shifts during this period. These changes are usually small and may not require additional treatment.
Long-term studies following LASIK patients over two decades confirm that the corneal reshaping performed during surgery is permanent. The correction itself does not fade or reverse over time.
- The reshaped corneal tissue remains stable in the large majority of patients
- New vision changes that develop years later are caused by natural aging, not by the LASIK procedure
- Most patients continue to enjoy meaningful improvement from their original surgery over the long term
- Small amounts of nearsightedness or astigmatism may gradually develop as the eye ages naturally
LASIK reshapes the cornea (the clear front surface of your eye) to reduce your reliance on glasses or contacts, but it does not stop the normal aging of your eyes. Presbyopia becomes noticeable in the forties and will affect reading vision regardless of prior laser surgery.
Cataracts, a clouding of the eye's natural lens, are another age-related development that LASIK does not influence. When cataracts do develop, cataract surgery can restore clear vision and works effectively in eyes that have previously had LASIK. Knowing this in advance removes some of the uncertainty about what laser vision correction means for your eyes over a lifetime.
Factors That Shape Your Personal LASIK Outcome
Several individual factors influence how predictable and complete your results will be. Understanding these helps explain why thorough pre-operative evaluation matters so much.
Your cornea must have sufficient thickness to safely undergo laser reshaping and still maintain structural integrity afterward. Thinner corneas limit the amount of correction that can be performed and may make alternative treatments a better fit. Certain conditions, in particular keratoconus (a progressive thinning disorder of the cornea), make LASIK unsuitable.
- Thicker, regularly shaped corneas allow the greatest treatment flexibility
- Thin corneas may be better served by PRK, which does not require a flap
- Computerized corneal mapping helps identify subtle irregularities before surgery
LASIK temporarily affects the corneal nerves that help regulate tear production. For patients who already have dry eye before surgery, this can intensify symptoms during recovery. If significant dry eye is present, we may recommend treating it first or discussing procedures that have a lower impact on the ocular surface.
Mild dry eye does not automatically rule out LASIK. We evaluate tear film quality as part of every consultation and will suggest ways to optimize your eye surface health before moving forward.
One of the most important screening criteria for LASIK is a stable prescription. We look for documented evidence that your refraction has been stable for at least one year before surgery, meaning it has not changed by more than 0.5 diopters. If your glasses or contact lens prescription has been shifting significantly from year to year, your eyes may not yet be ready for surgery.
General candidacy criteria include the following. Your evaluation will determine whether LASIK, PRK, or another approach is the right fit for your eyes.
- At least 18 years old for mild myopia, or 21 years old for high myopia, hyperopia, or astigmatism
- Free from eye disease or corneal abnormalities
- Myopia no more than 15 diopters, astigmatism between 0.75 and 4.0 diopters, or less than 3 diopters of hyperopia
- A refraction documented as stable for at least one year
- Informed of the risks and benefits of LASIK compared with other options, and willing to sign the informed consent form
LASIK is not appropriate if you have a severe collagen vascular, autoimmune, or immunodeficiency disease, if you are pregnant or nursing, if you have signs of or have been diagnosed with keratoconus, or if you are taking Accutane (isotretinoin) or Cordarone (amiodarone hydrochloride). Tell your doctor about all medications and allergies, and discuss any history of diabetes, severe allergies, or herpes simplex or zoster in the eye.
Every person heals at a different rate and with a different inflammatory response. Some patients reach their target vision quickly with minimal disruption, while others may take longer or experience more variation during the healing phase. Certain medical conditions, medications, and autoimmune disorders can influence healing, which is why we review your full medical history carefully before recommending surgery.
Your own care during recovery plays a direct role in your results. Using prescribed eye drops as directed, avoiding eye rubbing, wearing your eye shield as instructed, and attending all follow-up appointments all support proper healing. Patients who follow instructions consistently tend to experience smoother recoveries and more satisfying outcomes.
Preparing for Your Procedure
A few practical steps make the process easier and protect the accuracy of your measurements.
Contact lens wearers must stop wearing lenses before both the evaluation and the surgery, because lenses temporarily change the shape of the cornea. For a free LASIK consultation, you must be out of contacts for at least 48 hours beforehand. Before surgery, plan on 7 days out of soft lenses, two weeks for toric lenses, and 2 to 3 weeks for rigid gas permeable lenses, or until the cornea is stable. Advanced CustomVue patients should be out of soft lenses for a minimum of two weeks and gas permeable lenses for three weeks, or longer if your doctor instructs.
- Arrange for a responsible adult to accompany you and drive you home
- Take your regular medications
- Wear no perfume or make-up
- Eat a light breakfast or lunch
- Wear loose, comfortable clothing
- Arrive on time, since you will be escorted to the laser room only after signing the consent form and having all your questions answered
The procedure itself takes less than 10 minutes overall. You will be given numbing drops, and you will be told in advance about any sights, sounds, and sensations you will experience.
Post-LASIK Care and Monitoring
The days, weeks, and months after surgery are when attentive care makes the greatest difference. Here is what to expect and what to watch for.
Most of the vision correction occurs within the first 24 hours, and most patients are surprised by how quickly they can function without glasses. During the first few days, a foreign-body or scratchy sensation, tearing, light sensitivity, halos at night, fluctuating vision, and small red spots on the white of the eye are all normal parts of healing. Some discomfort may last up to three days.
- Use prescribed eye drops exactly as instructed
- Wear the eye shield for the first three nights after surgery
- Do not rub or squeeze your eyes for one week
- Wear sunglasses, which help with normal light sensitivity
- No make-up for one week
- Avoid contaminated water, such as pools and hot tubs, for one week
- No sports for one week
- Call the office if you have severe pain that cannot be controlled with over-the-counter pain medication
Do not drive until your doctor has given you permission.
Keeping every post-operative appointment is one of the most important things you can do for your outcome. Your surgeon will set your follow-up schedule over the first year so we can track healing, measure your vision at each stage, and address any concerns before they become problems. All post-operative care is provided at our own offices, so you always have direct access to your surgeon rather than being sent elsewhere.
After the first year, continuing with annual comprehensive eye exams remains important. Conditions like glaucoma and retinal disease can develop independently of your laser correction, and regular monitoring protects your overall eye health.
Post-LASIK dryness is one of the most common short-term side effects. The corneal nerves affected during flap creation take time to regenerate, and during that period your eyes may feel dry or intermittently blurry. Artificial tears used frequently throughout the day can significantly reduce discomfort and help maintain visual clarity during this period.
Depending on your symptoms, we may recommend preservative-free lubricating drops, overnight gels, or other dry eye treatments. The uniform, typically thinner flap created by the IntraLase laser causes less disruption of corneal nerves, which is associated with a lower occurrence of dry eye symptoms than blade-created flaps.
Serious complications after LASIK are rare, but certain symptoms should prompt immediate contact with our office. Do not wait for a scheduled appointment if you notice any of the following.
- A sudden significant decrease in vision
- Severe eye pain that does not improve with prescribed or over-the-counter medication
- Heavy discharge or crusting on the eyelids
- A dramatic increase in redness or light sensitivity
These symptoms could indicate infection, flap displacement, or another issue that needs rapid evaluation and treatment.
Frequently Asked Questions
These answers address common questions that go beyond the basics, offering practical guidance to help you decide and plan with confidence.
The corneal reshaping itself is permanent and does not degrade over time. What can change is your eye's prescription due to natural aging processes that occur independently of the surgery. If new nearsightedness or astigmatism develops years later, it is a separate change in your eye, not a reversal of the original LASIK result. Whether that change warrants treatment depends on its degree and how it affects your daily life.
Some patients are candidates for an enhancement procedure if meaningful prescription changes develop after their original surgery. The key considerations are whether your cornea has adequate remaining thickness, whether the new prescription has been stable, and whether the expected benefit justifies additional treatment. For qualified patients, our lifetime follow-up plan covers enhancements at no additional cost. Not everyone qualifies, and each case is evaluated individually with detailed corneal measurements before any decision is made.
A standard glasses prescription is measured in 0.25 diopter increments. A wavefront aberrometer measures in 0.01 diopter increments, which is 25 times more precise. That detail lets the laser address not just your basic refractive error but also higher-order aberrations, the subtle imperfections that can affect sharpness and night vision. iDesign 2.0 goes a step further by combining that wavefront analysis with corneal topography, measuring the eye inside and out to build a treatment tailored to each individual eye.
There is. An upgrade to the optic technology on NASA's James Webb Space Telescope was later applied to eye surgery, allowing doctors to create a high-definition map of a patient's eye to guide LASIK. That approach became the iDesign system, which provides five times more data points than previous eye-mapping technology when measuring the aberrations and irregularities of an individual eye.
PRK (photorefractive keratectomy) uses the same excimer laser technology as LASIK, and the Advanced CustomVue treatment can be applied as a surface treatment for patients who do not qualify for LASIK. The key difference is that PRK does not create a corneal flap, and the treatment is applied directly to the corneal surface instead. That makes it a strong option for patients with thinner corneas or for those in professions or activities where a potential flap complication would be a concern. Vision improvement is noticeable within a few days, with complete recovery taking up to six weeks and vision reaching its final state within six months. PRK has seen a resurgence in recent years thanks to improved technology and a better understanding of the limitations of LASIK in certain eyes.
Your consultation includes a complete health and eye history, a comprehensive examination including computerized corneal mapping, a prescription assessment, and a conversation about your visual goals. If you are a good candidate, surgery can often be scheduled relatively quickly, depending on your schedule and the contact lens discontinuation period required before your measurements are taken. Remember that you must be out of contacts for at least 48 hours before the consultation itself so that your cornea has returned to its natural shape, which ensures the most accurate measurements possible.
Good questions to bring to any laser center include: How many procedures do you perform, and how long have you been performing refractive surgery? What is your enhancement rate? Is your laser FDA approved, and approved for nearsightedness, farsightedness, and astigmatism? What are my alternatives, and what are the benefits of LASIK for my specific amount of refractive error? What can I expect my vision to be like afterward, and will LASIK affect my need for glasses as I get older? We welcome all of these.
Schedule Your Free LASIK Consultation at The Eye Center
If you are ready to explore whether LASIK is right for you, our team is here to provide an honest, thorough evaluation and realistic expectations tailored to your eyes. The Eye Center has been on the forefront of vision correction for Northern Virginia communities since 1989, with more than 35 years of experience and five convenient locations in Sterling, Leesburg, Fairfax, Alexandria, and Manassas. Contact us to schedule your complimentary LASIK consultation.