The fact that every pair of Ray-Bans I’ve seen say hand made in Italy on them seems to undo your point.

If you honestly think that, you're not very good at logic.

Putting that aside, if it's not common knowledge, I'll provide some evidence:

Some Ray Bans are made in China: https://www.americansunglass.com/pages/ray-bans-made-in-chin...

This is corroborated on Luxottica's website: http://www.luxottica.com/en/eyewear-brands/ray-ban

And here's a listing for the glasses, in which the product description, Q&A and review sections confirm they could be made in China: https://www.amazon.com/Ray-Ban-RB3364-Rectangular-Metal-Sung...

Those are good points. I’d counter them by saying that the pair I own, I bought direct from the manufacturer, and they bear the text I quoted. It’s true that every pair I’ve seen bear this text. My point is the brand has value due to the working conditions under which the product was made, and the quality of materials used. I would consider the glasses hand made in Italy to be the superior products to some purchasers’ minds, as they are closer to the original origin of the product. This is not to say products from China cannot be quality products, but the heritage of the company in question does count for something.

Do you know that more than a half of Italy's hand crafted goods market is owned by Chinese?

I mean quite literally, there are Chinese factories all around Central Italy.

And they do outsource for big brand owners there; that's pretty much their main business.

Doesn't that just mean that the lenses are popped into the frames by someone in Italy?