Possible Complications

Intraoperative

Most LASIK complications are related to cutting the flap. Very few are related to laser. Flap complications include an irregular flap, thin flap, short flap or button-hole flap. These complications are very rare nowadays. When it happens, we stop the surgery, replace the flap and wait for 3 months, or until the flap has healed. Then the procedure can be done again. Typically, the results are as good as those successfully done at the first time.

Unsteady fixation can lead to de-centered treatment and double vision. Fortunately, nowadays, the advanced three-dimensional tracking system is available. It can ensure that laser treatment is applied centrally. If the eye moves too much, the laser will simply stop, preventing de-centered treatment.

Post-operative

Over-correction, under-correction and induced astigmatism may occur and can be corrected if the corneal tissue is thick enough. Complications such as infection, macular haemorrhage, corneal haze, epithelial in-growth, interface debris, flap movement, and loss of best corrected visual acuity are very rare.