Laser and Lasik eye operations
Laser and Lasik operations for correcting vision are performed for those who have glasses but they wish to replace glass with some other things. Individuals with hyperopia, myopia, and astigmatism are candidates for these operations. These diseases are called refractive defects. In these patients, due to impaired refraction of the vision, no clear image develops from either far or close sites on the retina. Laser operations correct the refractive defects of the eyes and function as glasses, thereby resolving this defect. In individuals with Presbyopia, these operations can again be done, though it is not possible to confidently consider these individuals as candidates for surgery.
These operations are performed on the cornea and with transformation that they develop on the cornea they cause focus and transparency of images in the eyes. The operations have two stages: in the first stage a thin layer of the corneal surface which is called epithelium is removed (PRK or a thicker layer which is called flap is removed from the cornea) and in the second stage using a special laser device known as Exmier laser the desirable changes are created on the cornea. Although the final stage in all of these operations is performed by laser, the stage of corneal preparation is performed with different methods, and these operations are usually named in terms of the first stage of operation.
In this text, we try to explain different methods of these operations as well as their similarities and differences and also discuss the advantages and disadvantages of each of them, so that you get familiar better with the procedure of these operations.