There are several corrective laser eye surgery procedures. After discussion of your specific focusing error and the measurements of your eyes an informed decision can be made as to the most appropriate procedure for you.
PRK: (also referred as ASLA) Photorefractive Keratectomy or Advanced Surface Laser Ablation
The use of one laser, an excimer laser, without the creation of a corneal flap. The surface epithelium is exfoliated to allow the excimer laser to be applied to the corneal bed, remodelling the curvature of the cornea to compensate for the focusing error present. The epithelium then regenerates naturally. Visual recovery is slower than with a LASIK or SMILE procedure, but PRK is often the procedure of choice if the cornea is thin and refractive error is low.
LASIK: Laser In-situ Keratomileusis
A femotosecond laser is used to form a thin flap on the front of the cornea. The flap is lifted and a second laser, an excimer laser is applied to the exposed deeper corneal layers (stroma), reshaping the stroma to achieve the desired level of correction. The flap is then replaced and correctly repositioned over the modified corneal bed, conforming to the new shape.
SMILE (Small Incision Lenticular Extraction)
The use of just a femtosecond laser to create a “micro incision” rather than a flap. The laser also creates a lenticular shaped piece of tissue that is then removed with forceps via the “micro incision”. SMILE is the latest advancement in corrective laser eye surgery, not necessary the procedure of choice for all corrections.
A thorough ophthalmological examination fully informed discussion is required to determine the most appropriate procedure for you and your eyes.