UNDERSTANDING YOUR
EYEGLASS PRESCRIPTION
UNDERSTANDING PRESCRIPTION
When you buy eyeglasses, entering your prescription accurately when ordering is extremely important! Let’s look at a typical prescription and take a moment to understand the basics of the different components:
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There are generally accepted standards for the abbreviations and numbers that you’ll see on your prescription.
ABBREVIATIONS
OD = Right Eye
OS = Left Eye
Sph = Sphere
Cyl = Cylinder
Axis = Lens Axis
Add = Bifocal Power