Sunglass shape being influenced by Mad Men?

In a collection largely influenced by the womanly silhouette of the '50s and early '60s, Louis Vuitton also presented some sunglasses reminiscent of the same era.

Observe:

Though the lacework in them is something new altogether, the shape is almost hinting at the cat eye glasses that my grandmother used to wear.

See the resemblance?:

So with the idea that Mad Men-esque designs might be appearing in eye wear next, I was not too, too surprised to see these babies, available from Nasty Gal.

Eh?

A bit too costumey for my taste, but following the same trend nonetheless.