This varies among patients. Results may be better or worse depending on a patient's degree of refractive error. For instance, some patients may need glasses for reading, night driving, or other specific tasks.
Most patients note that they can do most things without glasses or contacts after the procedure.
Possible side effects and complications will be discussed in detail with you by your doctor. As in any kind of eye surgery, there is no guarantee of success. Because patients respond and heal differently, it is possible that the entire refractive error may not be corrected. If you are undercorrected, your vision will be clearer without glasses, but less powerful glasses may still be necessary to fine tune to your best vision. Some patients are overcorrected.