Round sunglasses with leather side shields - Morgan Freeman - Oblivion
The brand of the glasses has not yet been identified, the shape of the lenses, the leather sides and double bridge looks a lot like vintage Willson safety goggles but they could be a prop made especially for the film. You can still find quite a selection of the Willson glasses on eBay.
You can also search for 'Round Sunglasses With Leather Sides' on eBay.
The glasses and especially the details of the leather sides also look very similar to the vintage American Optical (motorcycle) driving goggles pictured on the left.
A brand that still makes similar round glasses including the leather side shiels is Julpo, for example their Vermont Mythic and Vermont Classic sunglasses, but those leather sides are black in stead of brown.