LASIK surgery in Singapore is performed by creating a very thin, superficial flap in the cornea with a microkeratome or a femtosecond laser. Once the hinged flap is folded back, the surgeon can access the underlying cornea and remove some corneal tissue using an excimer laser. The excimer laser directs an ultraviolet light beam, reshaping the cornea so that light entering the eye focuses more accurately on the retina for improved vision. The flap is then laid back in place after the cornea has been reshaped with laser ablation. After LASIK surgery, the flap is sealed to the cornea beneath.