Refractive surgery is usually recommended when your refractive error has stabilised, and that usually occurs between 18 - 21 years of age.
If you are significantly older than that, or your refractive error has worsened significantly then a comprehensive evaluation by your ophthalmologist is recommended to exclude other causes of refractive error including cataract, hyperosmotic hyperglycemia (diabetes mellitus) or staphyloma of the eye that would make refractive surgery inappropriate.
If the myopia or astigmatism "deteriorates" by a minor amount like 25 degrees then this is considered relatively minor and within the variance and tolerances of normal spectacle testing, and not too much emphasis should be placed upon this.
I do recommend a complete and thorough evaluation by your attending ophthalmologist who will help you to ascertain whether you are suitable for surgery.
Best of luck!