How do I read my prescription?

We know prescriptions can look confusing if you’re not an optician. Here are some of the most common terms:

• OD / OS – Right eye (OD) and left eye (OS) parameters

• SPH (Sphere) – Lens power for nearsightedness (-) or farsightedness (+)

• CYL (Cylinder) & AXIS – Corrections for astigmatism

• ADD – Extra magnifying power for reading or progressive lenses

• PD (Pupillary Distance) – Distance between your pupils, measured in millimeters. Check out our step-by-step guide to find this measurement here. 

We’ve made it easy to purchase prescription lenses online—  just upload your prescription at checkout and our expert opticians will take care of the rest.

Feel free to contact us with any questions regarding your prescription.

We’d recommend checking out this video to learn more about reading your prescription.