Is... Tiny Sunglasses!
From Bella to Rihanna, every trend setter is sporting tiny specs, usually worn down the bridge of one's nose.
To wear miniature shades is to ask to be seen and to be photographed. The tiniest statement is making the loudest sound in fashion.
So how did fashion jump from face covering lenses to micro shades? I'd trace it back to Balenciaga's Spring 2017 show, where they made their debut.