Wearing prescription glasses and sunglasses in the summer can be a pain, having to always carry both pairs and change between the two as you move from indoors to outdoors. However, thanks to Crystal light-adaptive photochromic lenses, it’s possible to wear just one pair all the time.
The pros of Photochromic Lenses is that it looks like regular clear lenses when indoors but automatically darkens when moving into a brighter area.