What to do if i'm 46 yo with pathologic myopia. recently my prescription jumped from -17 to -20! can any treatment stop/reverse it?

Pathologic Myopia: This high degree of myopia is generally because of two reasons. A staphyloma in the retina which is an outpouching in the back, making the eye effectively longer, or keratoconus, a disorder in the cornea. A rigid gas permeable contact lens can be used or, if you qualify, an intraocular contact lens (ICL) can be placed. You would need to see an ophthalmologist that has experience with placing ICLs.

Malignant myopia: Is associated with progressive increase in nearsighted correction, sometimes to a level that you are experiencing. Usually, the prescription doesn't progress that much at your age. You should have your ophthalmologist evaluate you to make sure that you're not developing cataracts. They can also cause progressive myopic changes.