How do I read my prescription?

Some of the most common items that will appear on a prescription are listed below:

OD = Parameters of the right eye
OS = Parameters of the left eye

SPH = SPHERE power. It indicates the amount of lens power prescribed for nearsightedness (-) or farsightedness (+)

CYL = CYLINDER power - the degree of astigmatism
AXIS = The direction of astigmatism, measured in degrees (1-180)
ADD = Provides the additional magnifying power of reading, progressive and computer lenses. This is always a positive value.

PD = Pupillary distance. It’s the distance between the center of one pupil to the center of the other pupil, measured in millimeters. Learn how to measure this value by yourself here with this article from our Optical Centre.

You can upload your prescription during the checkout process to avoid having to write it all out, and our experienced opticians will process it on our end.

Please contact us if you have any questions about your prescription.

To learn more about reading your prescription, we recommend watching this video.