From your description, you want to change your eyeglasses frame. Technically, you are not suggested to change your frame only by optician. But i think it is OK to do it. I have such experience. My eyes are nearsighted with -3.00 prescription for both eyes. I hate my eyeglasses, but buying a pair of new eyeglasses
are expensive since i am a student. To save money, i bought a new eyeglasses frame (have similar frame size of my old eyeglasses) and have an optician filled the lenses. And the "new" eyeglasses didn't cause any distortion. I have worn this eyeglasses about a year now. Nothing happen to my eyes.