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Can both eyes be treated at the same time?


Yes. Research data have shown that bilateral LASIK is safe and convenient. This practice is in fact now routine in many centres around the world. Bilateral surgery is even preferred by many patients and surgical centres for the following reasons:

– Half the emotional stress of going through the procedure.

Instead of going through the same procedure twice at different times, bilateral Lasik allows patients to only go through the procedure once. The emotional stress before a surgery is therefore only experienced once instead of twice.

– Half the amount of time off from work and for the recuperation process.

It is recommended that you rest for the days after your LASIK surgery, about 3-5 days excluding the surgery day, while this might not seem like much, keep in mind that this is per procedure,6-10 full days of rest would be needed if you choose to receive LASIK surgery for your eyes separately. Having bilateral LASIK gives you the benefits of resting both eyes at the same day as well as recuperation process.

– No problem with double vision and vision intolerance from anisometropia during the interval between the first and second treatment. Anisometropia describes the condition of imbalance vision resulting from grossly differing refractive powers between the two eyes.

In fact, LASIK itself is an effective and safe treatment for anisometropia1.

However, some surgical centres and patients may elect to have the eyes treated separately for the following reasons:

– Fear of having both eyes operated on at the same time.

If you, as a patient, are extremely uncomfortable with the idea of having both of your eyes operated on at the same time, it is recommended that you go with other solution that you are most comfortable with. Such as separate LASIK procedures.

– Concerns about bilateral eye infection.

While there is a risk for eye infection, the serious eye infection rate is about one in five thousand eyes.

– Reduced risk of bilateral overcorrection.

As with the single-eye LASIK treatment, careful evaluation and consideration is needed before any decision. Discuss with your doctor based on your personal risk factors to understand your risk of bilateral overcorrection.

  1. Laser in situ keratomileusis for anisometropia in adult patients, Haili Li, MD, Ph D, Guy Chan, MD, FACS.