Nice transition. However they are kind of wide on the face.I thought I had order these in 2.0 lens but obviously once I put them on clearly not bi-focal. Useable but I have to carry a pair of bifocal glasses with me.These don't really darken much in the hot Arizona sun, and never become truly clear. Mostly they gradiate from light gray to middle-light gray.I like that they get darker and lighter, but they have met my standardsExactly what you pay for. One of the nose pieces fell off within 24 hours (lost as I did not realize it at the time) and ear pieces come off as well (was told i could add adhesive not sure why I have to do their job). First and last experience of purchasing sunglasses online.The ear tips came offVery cheap construction, looks cheap too...Not Photochromic. Uncomfortable. And they fall off. They take forever to ship. I own quite a few sunglasses but these will be going into the trash. Do not buy.