If you are unsure on how to enter your prescription, you can attach a file copy to your order, or fax it to us at 866-800-8809. Be sure to include the PD - pupil distance.
Depending on your prescription, you will not find all the listed readings
OD = Right eye
OS = Left eye
OU = Both eyes identical prescription
Sphere = Power of the lens - nearsighted + farsighted. Sphere will always indicate a + or -.
Cyl = Correction for Astigmatism. Cyl will also indicate a + or -.
Axis = Indicates the location of the cyl correction (E.G. x 153)
DS = Indicates no Astigmatism. No cyl or Axis in the prescription
SPH = Indicates no Astigmatism. No cyl or Axis in the prescription
ADD = Correction for near vision used in Bifocals, Progressive and Computer Glasses It will be a + number.
Prism = Corrects image imbalance. The number will be followed by BI, BO, BU, BD to indicate the direction of the prism.