[dpark]

I have no idea what is common in Norway, but Rodenstock’s English website also says plastic is more common.

Today plastic lenses are considered “State of the Art” and are found in most spectacles.

https://www.rodenstock.com/journal/plastic-vs-mineral-glass

> You can always tell if it's glass by tint of PVD coating. Polycarbonate or acrylic lenses can't be coated.

This not true. Plastic can absolutely be PVD coated. You can buy cheap sunglasses with PVD mirror coatings on plastic lenses. I’m pretty sure Rodenstock’s own plastic coatings (e.g. “Rodenstock technology Solitaire® Protect Plus 2”) are also a PVD process.

> Plastic's only advantage is low manufacturing cost.

And weight. And shatter resistance. And higher refractive index options.