I wore my new reading eyeglasses for only two days, I feel terrible when put them on, because the prescription of my eyes are not the same, while the premade reading eyeglasses have the exactly same Rx, I will never buy that kind of eyeglasses anymore!

That's true, pre-made reading eyeglasses do have many advantages, PD,Rx and CYL are all needed to be taken consider into when buy what ever reading glasses and myopia eyeglasses, so a detailed prescription is needed when buy eyeglasses, choose the customized ones next time. Good luck!