There are mainly two techniques for correcting refractive errors such as myopia, hyperopia or astigmatism. One of them is the placement of intraocular lenses and the other is the Excimer laser.

When applying this technique, the laser carves the cornea, that is, changing the shape of the cornea. In this way, diopters related to myopia, hyperopia or astigmatism can be corrected.

There are ideal cases to work with this Excimer laser technique. These cases are those referring to patients who:

• They have good corneal thickness
• They have no history of dry eye
• They do not have corneal diseases

In addition, it should be noted that eye surgery with Excimer laser includes two types of techniques:

The LASIK technique, in this technique, first a cut is made in the cornea with a femtosecond laser, then the superficial part of the cornea is lifted and later with the excimer laser what is done is to carve that cornea to change its shape and thus correct the diopters. It has a quick postoperative period and the discomfort is minimal. 

The PRK technique, in this case the laser acts directly on the cornea. The postoperative period is somewhat more annoying, more painful, and vision recovery is somewhat slower.

Both techniques have been used for years and are recommended for prescription errors that do not exceed 5 or 6 diopters.