Yes. Overall, it is possible to correct myopia from -1 to -10 diopters, hyperopia from +1 to +6 diopters, astigmatism from 0 to 5 diopters.
These values are averages. They may vary according to the age of the patient, the thickness of the cornea, the experience and the material used by the surgeon. The value of the maximum correction depends on the thickness of the cornea (the thicker the cornea is, the thicker it is possible to reshape it) and the diameter of the pupil (the more significant the width of the pupil, the larger the optical zone must be and the more difficult it will be to correct the refraction).
If myopia or hyperopia is extreme (up to -20 or -25 dioptres for myopia and up to +12 dioptres for hyperopia) or if the cornea is too thin, the surgeon can opt for putting in intraocular implants. The surgeon inserts the corrective optical lens either in front of the lens or as a replacement for the lens.