The amount of astigmatism grade that can be removed by laser surgery will be largely determined by the anatomical characteristics of the patient's eye. Generally speaking, ophthalmologists point out that there is no diopter limit to be corrected by laser surgery for astigmatism.
However, it will always be the surgeon (with the data from the preoperative tests performed in the first consultation) who decides if it is feasible to correct all diopters by laser. Also, it must be taken into account that the doctor can choose different procedures to correct the diopters of astigmatism. It can be corneal surgery with Excimer laser (Lasik or PRK / Lasek Surface Techniques) or intraocular surgery for the implantation of intraocular lenses.