In general, the lens shape has been ground, and then re-processing will theoretically change the parameters of the lens. For example, the pupillary distance will change, and so will the optical center. The most important thing is that you are highly nearsighted, plus astigmatism. Changing the shape of the lens will change the axial position of astigmatism and make it more uncomfortable to wear. If you have to change it, you should also choose a smaller lens shape similar to the original frame. People like you who are sensitive to readings can go to a better optical shop to get glasses after optometry in the hospital. If you feel uncomfortable wearing it, they should help you solve the problem, unlike the hospital. I hope they can help you.