Overcorrected to +0.25 OU with residual astigmatism (s/p 1 week after Wavefront optimized PRK OU). Is this permanent?

One week after optimized PRK OU for myopia with astigmatism (OD -3.75, -1 x010, OS -2.5, -0.25 x170) with Alcon Wavelight Ex500 settings at -3.6-0.77x 010 , -2.39-0.25 x170. Nearsighted since w severe ghosting. autorefracted (+0.25, -0.75) (+0.25, -2). The OD @ post op said healing besides trace SPK OU and didn't mention seeing corneal haze, scar, edema on slit lamp. So why am I overcorrected and is it permanent? finished 1 week course of Ofloxacin.doing 1 mo tapered prednisolone, art tears.