Tajima & Jacob is amazing, phenomenal service & turnaround. I used the 15% gray mirrored for my 1st set of Serengeti's after the original lenses fell out & broke. I was desperate since I needed the sunglasses due to a PSC cataract. Wow, this lens was totally amazing, blew me away. I eventually had cataract surgery and was concerned since the Vivity multifocal lens is also polarized with a blue filter, but it works perfect with the Tajima 15% gray mirrored. So, I wanted a 2nd pair, found the identical frames on eBay, and sent it to Jacob & Tajima - I have a spare backup pair. My friend is also getting cataract surgery needing high quality glasses & she was amazed when putting on Tajima's lenses, she will be ordering too. Keep up the great work, I totally ecstatic on the results !!!