Global Vision Eyewear Outfitter Motorcycle Glasses (Black Frame/Smoke Lens)

Will these block blue light from computers/tabs?

How well do they fit over prescription glasses?

My glasses are 12 cm (just barely under 5 inches) wide, and not curved at all, will these fit?

I'm looking for something to wear outside during the winter for hiking/snowshoeing. Would these work or should I consider goggles?