Optics insert - ESS URX Sunglass/Goggle Universal Prescription Insert

The optics insert that I recieved works great!! There is enough space in the frames,that my Opthalmologist was able to get a bi-focle option in the lenses.
The glasses with the insert fit fantastic,no discomfort of any kind. I used
Them the other night during Light Rifle League shoot,and had absolutely no
Problems of any kind with aquireing sight picture with iron sights. A great
Product!! Thank you.