The PTX Rx Insert is used to add prescription lenses to the Wiley X PT-1 and Saber Advanced eyewear.
To use the PTX Rx Insert you need to take the insert to your optometrist. Their lab will install prescription lenses into the PTX Insert. The PTX Insert is then installed above the nosepiece of your Wiley X PT-1 or Saber Advanced eyewear.
The PTX Rx Insert can accommodate prescriptions in range: +/-6.00