What You Need to Know?

As with any surgical procedure, there are certain problems and side effects associated with LASIK. Most of these complications are temporary and can be treated.

It is important to understand that even though LASIK is highly accurate, perfect vision cannot be guaranteed.

Under- or Over-Correction

The 2 most common problems associated with LASIK are under-correction or over-correction. In either case, enhancement can be done to fine-tune your vision 3 to 6 months after your initial LASIK surgery.


This is an uncommon problem. It occurs if the "flap" is unevenly replaced, possibly inducing astigmatism. Mild wrinkling usually recedes in 3 to 6 months, but in rare cases, a second procedure may be needed to smooth out the wrinkles.

Night-Vision Problems

Glare and haloes are common side effects of LASIK. It is more likely to occur if you have large pupils, small treatment zones and a high degree of myopia. Cases of severe, disabling glare and haloes are few nowadays, especially with more advanced Wavefront Enhanced Q-adjusted LASIK technology.

Night traffic - normal vision
Night vision with glare
Post LASIK Complications: Visualisation of Normal Night Vision Post LASIK Complications: Visualisation of Night Vision with Glare
Night vision with haloes
Night vision with haloes & glare
Post LASIK Complications: Visualisation of Night Vision with Haloes Post LASIK Complications: Visualisation of Night Vision with Haloes and Glare

Some post-LASIK patients experience starburst effects due to swelling of the cornea. This occurs early in the healing phase and is usually temporary.

In the last few years, laser technology has been directed towards the problem of poor night vision. Many patients treated using lasers with more advanced technology (such as the Wavefront Allegretto Eye-Q laser) do not suffer from poor night vision.

Dry Eyes

After LASIK surgery, you may suffer mildly from dry eyes for a brief period of time. The eye becomes less sensitive immediately after LASIK, and is unable to produce enough tears to keep the eyes moist. In general, with the use of preservative-free eye drops and oral supplements, you will recover from dry eyes within a few weeks.


Cases of post-LASIK infection are unpredictable and occur in one out of 5,000 patients. You will be prescribed antibiotic eye-drops after LASIK to prevent infection. It is important that you go for your post-operative visits to ensure your eye is healing properly.

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