[jkestner]

Polycarbonate is great for UV resistance, though not sure that matters for something you use indoors. I’ll grant you scratch-prone.

There are additives and coatings for everything now, and the glass Apple is using is also highly engineered so you can get just what you want no matter what. I’ll bet it comes down to feel and consumer experience.

[detourdog]

Only with a UV film installed to protect it. I think all plastics degrade under UV light and polycarbonate is no different. It will yellow and lose it's strength with unprotected UV exposure.

[jkestner]

Not so. Sure, everything degrades eventually, but HDPE, PC and acrylic are notably UV resistant, and even polypropylene, which is normally weak in UV, is used in outdoor furniture. Thickness and color matter, but inexpensive UV stabilizers can be added to most plastics as well, and you can get a guaranteed 7-10 years of outdoor life, let alone the sheltered life of a Vision Pro. Source: I make plastic products (sorry, world, that’s why I care about making them well).

Anyway, additives or coating, we agree one can get good outdoor performance with plastics. But forget glass, I’m waiting for the sapphire Vision Edition.

[postalrat]

I wore polycarbonate for lenses in my glasses before switching to trivex. Never had a problem with them turning yellow.

[detourdog]

Due to a protective coating.