My rx is as follows: OD: (sphere) -2.50, (cylinder) -1.00, (axis) 105 OS: (sphere) -2.50, (cylinder) -1.25, (axis) 083 Measures my Pupilary distance and one day it was 65, the next was 64. Will this be a problem? (Ordered glasses online). Will 1mm make a difference? What is the "grace" amount for PD? Thanks!