• OD refers to your right eye.
  • OS refers to your left eye.
  • Sphere(SPH)  Indicates the amount of lens power, prescribed to correct nearsightedness (-) or farsightedness(+).
  • ADD is the added magnifying power applied to the bottom part of multifocal lenses to correct presbyopia.
  • Cylinder(CYL)  indicates the amount of lens power for astigmatism.
  • Axis describes the positioning of the cylindrical power on your lenses (required for astigmatism).
  • Note: you will not be able to use a contact lens prescription – the two are different.