The quality of excellent. No different to my FCUK or Osiris glasses that I bought last time from Specsavers. All I needed was my prescription and my PD distance (they don't include this on your prescription) which I got from using this app?https://play.google.com/store/apps/details?id=air.PupilMeterAnd?
Anyway, I bought a pair of slick "Potters", some miners welfare glasses and a pair of yellow tinted glasses so I could look like the dude from half life. Sadly the yellow tint wasn't quite enough but I will get a darker yellow next time and maybe some with a red tint just to look extra cool.?