Q & A
1. How to read your prescription
Single vision (Distance only) : This is the most common for single vision
Progressive or Bifocal : for Multifocal glasses, as well as reading and
computer glasses, Your Rx will include an 'ADD' or NV value
ADD: this number always has a (+) sign
2. How to measure your PD ( Pupillary Distance)
In most cases, it is not written in the prescription.
You can measurement by yourself!