Last updated on
20 August 2025
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LASIK is a common procedure performed to correct refractive errors. It can reduce or even eliminate the need for prescription lenses or glasses for many people.
If you are considering this procedure, you probably want to know more about its safety as well. This guide covers what you need to know, from LASIK side effects to LASIK surgery risks.
LASIK stands for laser-assisted in situ keratomileusis. In this procedure, a precise laser is used to reshape the cornea so that it can achieve the correct refraction for clearer sight.
The procedure typically begins with the application of numbing eye drops. This is then followed by creation of a thin flap in the cornea.
This flap is lifted so that a computer-guided excimer laser can sculpt the corneal tissue underneath the flap. The sculpting is based on the patient’s prescription. It’s designed to correct how the cornea focuses light onto the tissue at the back of the eye, the retina.
Once the sculpting has been performed, the surgeon repositions the flap, which then heals naturally over time.
LASIK is often used to treat myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. It can take around 25 minutes for both eyes, and can start showing improvements to vision in as little as 24 hours.
LASIK is not generally considered dangerous. The procedure is USFDA-approved and boasts a success rate of over 99%. Specifically, over 99% of patients achieve 20/40 vision or better after it.
This means that most patients who undergo LASIK may even be able to perform daily activities without corrective lenses afterwards.
That being said, LASIK is still a surgery, and all surgeries have their share of risks. These still have to be taken into consideration before electing for the procedure.
One of the main risks of LASIK surgery to consider is the risk of flap complications. Examples of these are flap displacement and flap folding.
The risk of flap complications rises when there is a greater possibility of the eye suffering trauma or harsh contact of some kind. This is one reason people with active lifestyles are often advised to select a flapless alternative for refractive correction (such as PRK or photorefractive keratectomy).
Another possible LASIK surgery risk is over- or under-correction. This is often addressed with a subsequent LASIK procedure to enhance the quality of the correction.
Most risks can be minimised through a variety of strategies. These include proper candidate screening, selection of experienced surgeons, and strict adherence to recovery and care instructions.
Among the most common side effects from LASIK are dry eyes, light sensitivity, susceptibility to glare, and halos.
Fortunately, these are typically short-term. For example, dry-eye symptoms following the procedure often resolve after several weeks (or months in rare cases). They can also be managed with lubricating eye drops.
As for glare and halos, they usually take several weeks to settle as well. Regular check-ups with the eye doctor can help you ascertain if these are just normal side effects or worsening.
The ideal candidates for LASIK should meet the following requirements:
An eye doctor still needs to assess each patient for a clear decision on whether or not LASIK is a good choice, but these should give you a general idea of patient suitability.
Your ophthalmologist will give you pre-op instructions ahead of time. These will include such steps as:
After the surgery, post-op care will often include regularly scheduled follow-ups with your doctor to monitor your healing and visual outcomes. You may also be asked to take these steps:
If you think LASIK could be an option for your vision problems, seek an appointment with our eye doctors. We can perform a personal evaluation and screening to determine if you can benefit from the procedure.
Reach out to us today for an assessment and recommendation of a tailored treatment plan based on your needs.
