There are 3 popular types of LASIK. Conventional LASIK involves using a suction ring to hold the eye in place and using a microkeratome blade to cut a flap on the cornea. The corneal flap is then lifted and the stroma layer below is reshaped using excimer laser.
The second most common type of LASIK is IntraLase LASIK. The procedure is basically similar to conventional LASIK, except instead of using a mechanical blade, a femtosecond laser is used to create the flap. This causes less chance of complications and the patient heals faster.
However, there is potential side-effects with these two procedures such as:
Dry Eyes: when creating the corneal flap, the surgeon may sever some of the nerves on the cornea. Information cannot be transmitted to the brain like before, which makes the brain unable to stimulate the tear glands to supply tears to the eyes.
Flap Complications: possible complications may occur during surgery, such as the flap is not cut properly and the surgeon is unable to leave the flap or the flap is not placed back properly causing folds and bubbles. Post-surgery, the corneal flap may be displaced or infection sets in.
Corneal Ectasia: once the cornea is cut, it becomes structurally weak and may go out of shape, causing the vision to be distorted and blurry. This condition cannot be reverse and the vision can only be corrected by using a special hard lense.
Which is why the third type of LASIK is becoming increasingly popular – Epi-LASIK.