For your order to be processed in a timely matter please make sure to fax, text or email us your child’s prescription and please do not forget to include the PD or Pupillary Distance.
Here is a glossary of terms that describe your eye doctor’s prescription:
OD: From the Latin Oculus Dexter, meaning right eye (RE on some newer prescriptions).
OS: From the Latin Oculus Sinister, meaning left eye (LE on some newer prescriptions).
SPHERE (SPH): Indicates the amount of lens power, measured in diopters, to correct near- or farsightedness. A minus sign (-) indicates nearsightedness; a plus sign (+) indicates farsightedness.
CYLINDER (CYL): Indicates the amount of lens power to correct astigmatism. A plus sign (+) may mean that the prescription was filled out by an Ophthalmologist (MD). A minus sign (-) may mean the prescription was filled out by an Optometrist (OD). Be sure to input the correct sign; they are not interchangeable.
AXIS: A number ranges from 0 to 180 that indicates the direction of the cylinder power to correct astigmatism.
ADD: Refers to the added magnifying power applied to the bottom part of a multifocal or bifocal lens.
PRISM: Refers to the amount of prismatic power, measured in prism diopters, prescribed to compensate for eye alignment problems.
BASE: Used to describe prism direction: BU base up; BD base down; BI base in (toward the nose); BO base out (toward the ear).
PUPILLARY DISTANCE (PD): The distance between the center points of both eyes (pupils) in millimeters. This measurement ensures the correct positioning of the lenses within the frame.