Is it normal for one eye ito be weaker then the other. i wear reading glasses. ?

Not unusual: The refractive state of each eye is frequently different. One eye may appear stronger and the other may be weaker for reading or for distance vision.

Yes: It's not abnormal to have a different prescription in each eye, or a different level of focus (accommodation). Most of the time, however, your eyes will adjust to the demands that you place in front of them. Some people may require a separate reading eye glass prescription to fine tune each eyes focus. Another related issue is amblyopia, which is an impairment in an eye's level of vision (abnormal.