Wavy lenses.
[[VIDEOID:e2db3af7bd61b85a65c71a8ebaa4217a]] These glasses don't work as advertised.  The photos show that the progressive changes go all the way across the lense.  But it goes in an upside down u shape.  So that the center is the only spot that you can clearly see through.  If you want to look at something slightly to the side you must turn your head, not just your eyes, otherwise everything is distorted.  I hope the video shows better what I mean.  The glasses were about 12"15" from the computer screen. I'm returning them. I wanted to like them but can't see well through them.  The frames are great: sturdy, not cheap, a great color, & look great on. The frames are what made me give them 2 stars!
Rating: 2 stars