It looks like a new pair of sunnies are in order, and the rounder and more retro-ish, the better. Proof: these sightings of New York and London Fashion week goers, all sporting circular sunglasses. I love how they appear both vintage and modern--and playfully cool. I'm eyeing these glasses from Acne Studios (pictured above, left), Rag & Bone, Whistles (below), J.Crew, and Sunday Somewhere.

Photos: British Vogue, Vogue, Harper's Bazaar