Dear Ronald,

To ensure that you will receive a pair of glasses with progressive lenses that will work well for you, we recommend you verify your PD (Pupillary Distance) as most optometrists do not provide this information on the prescription. You can measure your PD easily by placing a ruler on the bridge of your nose and measuring the distance between your pupils in millimeters. The average PD for an adult is 63mm for distance and 59mm for reading. For more detailed instructions, you can visit our YouTube page at:

https://www.youtube.com/watch?v=WrC290hZN78

If you have any questions, feel free to contact us. We're here for you 24/7, at 1-844-244-1186.

Yours truly,
GlassesUSA