LASIK is one of the most widely performed elective procedures in ophthalmology, but it is not appropriate for everyone. Several factors must align for the surgery to be both safe and effective. You need to be at least 18 years old, and ideally in your mid-twenties or older, so that your prescription has had time to stabilize. Your overall eye health needs to be good, and the structure of your cornea must meet specific thickness and shape requirements. Understanding these criteria before scheduling a consultation helps you know what to expect.
LASIK reshapes the cornea to correct your current prescription, so the procedure works best when that prescription has stopped changing. Most eye care professionals require at least one year of stability, meaning no significant changes in your glasses or contact lens prescription during that time. If your prescription is still shifting, the correction achieved by LASIK could become outdated as the eyes continue to change. This is why younger patients are often asked to wait until their prescription has been stable for a sustained period.
According to a peer-reviewed review of LASIK outcomes from 2016 to 2023, 99.5 percent of patients achieved 20/40 or better uncorrected vision, and 88.3 percent achieved 20/20 or better. These numbers reflect the high level of precision and reliability that modern LASIK technology has achieved. While individual results vary, the vast majority of patients experience a dramatic improvement in their ability to see without glasses or contact lenses.
LASIK works by removing a precise amount of corneal tissue to reshape the eye's focusing surface. This means the cornea must be thick enough to accommodate the tissue removal while maintaining structural integrity. Your eye doctor measures corneal thickness with a painless scan called pachymetry. The corneal shape also matters. A cornea with significant irregularity, such as the cone-shaped bulging seen in keratoconus, may not be suitable for LASIK. Alternative procedures may be recommended for patients whose corneal measurements fall outside the ideal range.
LASIK can temporarily worsen dry eye symptoms because the procedure affects the corneal nerves that help regulate tear production. Patients with significant pre-existing dry eye may experience prolonged discomfort after surgery. During your evaluation, your eye doctor assesses your tear film quality, tear production, and meibomian gland function. If dry eye is present, it may need to be treated and stabilized before LASIK can proceed. In the desert climate of Spring Valley and Southwest Las Vegas, dry eye is especially common and is an important part of the pre-surgical assessment.
Your pupil size in dim lighting can influence visual quality after LASIK. Patients with very large pupils may experience more glare and halos at night. Your eye doctor measures pupil diameter in various lighting conditions as part of the evaluation. Additional measurements include the curvature of the cornea, the size of the optical zone to be treated, and a detailed map of the eye's focusing errors. Together, these measurements help the surgical team plan the procedure for the best possible outcome.
Certain autoimmune conditions, such as lupus, rheumatoid arthritis, and Sjogren's syndrome, can affect how the cornea heals after LASIK. If healing is compromised, the surgical outcome may be less predictable or the recovery may be prolonged. Your eye doctor and the LASIK surgeon will review your medical history to identify any conditions that could affect healing. In some cases, patients with well-controlled autoimmune conditions may still be candidates, but this requires careful evaluation.
Hormonal fluctuations during pregnancy and breastfeeding can cause temporary changes in the cornea's shape and the prescription. Most surgeons recommend waiting until several months after breastfeeding is complete before undergoing LASIK, to ensure the prescription has returned to its baseline. This waiting period protects the accuracy of the correction and helps ensure the surgical outcome is lasting.
LASIK can correct a wide range of nearsightedness, farsightedness, and astigmatism, but there are upper limits. Very high prescriptions require more tissue removal, which may not be possible if the cornea is not thick enough. For patients who fall outside the treatable range, alternative procedures such as PRK, implantable lenses, or clear lens exchange may offer a better path to reduced dependence on glasses. Your eye doctor can explain which options are available based on your specific measurements.
Insight Vision Optometry, Las Vegas provides the pre-surgical evaluation that determines whether you are a good LASIK candidate. Our optometrists perform the corneal measurements, dry eye assessment, prescription verification, and overall eye health examination that the surgical team needs to plan your procedure. After surgery, our team manages your post-operative care, including monitoring healing, checking for complications, and tracking your visual recovery.
The LASIK procedure itself is performed by an ophthalmologist who specializes in refractive surgery. The surgeon reviews the evaluation data provided by your optometrist, performs any additional measurements needed, and carries out the surgery. Our team coordinates with the surgical practice to ensure a seamless referral process and continuous communication throughout your care.
The co-management model means you have a local eye care team in Spring Valley and Southwest Las Vegas managing your care before and after surgery. You do not need to travel to the surgical center for routine follow-up visits. Your optometrist at Insight Vision Optometry, Las Vegas has access to your complete eye health history and can provide context that enhances the quality of your post-operative care. If any issues arise during recovery, your local team can address them promptly.
A LASIK candidacy evaluation is thorough and typically takes 60 to 90 minutes. The tests include corneal topography, pachymetry, refraction, pupil measurement, dry eye testing, and a dilated eye exam to check the health of the retina and optic nerve. These measurements are all painless and non-invasive. If you wear contact lenses, you will likely be asked to stop wearing them for a period before the evaluation, as contacts can temporarily alter the corneal shape.
After the testing is complete, your eye doctor reviews the results with you in detail and explains whether you are a good candidate for LASIK. The discussion covers your corneal measurements, dry eye status, prescription stability, and any factors that could affect the outcome. If you are a strong candidate, the next step is a referral to the LASIK surgeon. If certain factors make LASIK less than ideal for your eyes, your eye doctor will explain why and discuss alternative options that may be a better fit for your specific situation.
If you are a strong candidate, your eye doctor will explain the referral process, what to expect on the day of surgery, and how the post-operative care schedule works. You will receive instructions on contact lens discontinuation timing, any medications to begin before surgery, and practical considerations like arranging transportation on the day of the procedure. Having a clear understanding of the entire process before you commit helps you feel fully prepared and confident about moving forward with the procedure and recovery.
Most patients have LASIK in their mid-twenties to early forties. The lower age limit is 18, but many surgeons prefer patients to be at least 21 to 25 to allow the prescription to fully stabilize. Patients over 40 may still be candidates, though they should be aware that presbyopia, the normal age-related loss of near focus, may still require reading glasses after LASIK corrects their distance vision.
Yes. Modern LASIK effectively treats astigmatism along with nearsightedness and farsightedness. The laser is programmed to reshape the cornea into a more symmetrical curve, correcting the irregular shape that causes astigmatism. Most patients with astigmatism are good LASIK candidates as long as the astigmatism falls within the treatable range and the cornea meets the other thickness and shape requirements.
Being told you are not a LASIK candidate simply means that another approach may be safer or more effective for your eyes. Your eye doctor will explain why and discuss alternatives. Options may include PRK, which is similar to LASIK but suitable for thinner corneas, implantable contact lenses for very high prescriptions, or other procedures. There are multiple paths to reduced dependence on glasses, and your eye doctor will help you find the right one.
Plan for approximately 60 to 90 minutes. The evaluation includes multiple tests and measurements, some of which require dilating drops that take about 20 minutes to reach full effect. Bringing sunglasses for the drive home is recommended because your eyes will be light-sensitive after dilation.
In most cases, yes. Contact lenses temporarily alter the shape of the cornea, and accurate measurements require the cornea to return to its natural shape. Your eye doctor will provide specific instructions on how long to stop wearing contacts before the evaluation, which typically ranges from a few days for soft lenses to two weeks or more for rigid lenses.
