what if lasik doesn't work

It's quite normal to have questions and anxiety about this. If you mean 'doesn't work' as in 'doesn't fully correct your vision', then enhancements can usually be performed to refine the result, though this is only in a minor percentage. It's important to discuss all your concerns with your doctor, who would take your overall health, eye health, and refractive needs into consideration before the procedure.

While rare, possible complications of LASIK could include dry eyes, night vision problems, or even corneal scarring in very rare cases. Side effects usually subside within a couple of weeks after the surgery. If they persist, its important you contact your surgeon as it may require further treatment.

Yes and no. LASIK does permanently reshape the cornea and for many people, that will mean a lifetime without needing glasses or contact lenses. However, it won't prevent normal age-related vision changes such as presbyopia or old age sight or potentially, cataracts. It's also possible for some minor residual refractive errors to return over time.

While LASIK has a very high success rate, it's crucial to understand that individual results can vary and depend on many factors, including the surgeon's skill, the patient's eye health, and how the individual patient heals post-surgery. That said, the overwhelming majority of LASIK patients are pleased with their results.