My son's eye glasses before has these numbers: R SPH +2.00, CYL +2.00 Axis 080, L SPH +2.00, CYL +1.00 Axis 085, then after a year his Left was increased +2.75 and 1.75 on 90 axis. Last week, his new doctor has given these numbers: R SPH +3.75 CYL +2.00 Axis 90, L SPH -3.5 CYL +2.5 Axis 80. My question is this, i think the -3.5 is a mistake?