These work well for those of us who need prescription lenses - just pop them over the glasses. They work well because of their simplicity. They are light enough that one barely notices them after a few minutes and they are straightforward, no complications that come along with 'flip ups'.
Just what I hoped for.
and what a fantastic gift!! Came with a box, a case a cloth and as a bonus, a really nice pair of clip on sunglasses!!! Overall, i'm very pleased with this item.. and the recipient of the gift was as well!!
Fairly decent clip-on sunglasses for the price. I didn't find the polarizing to be as good as the $180 pair of sunglasses I bought twenty years ago, but can't wear because I have to wear actual glasses now even when I drive. The clip-on is sturdy and they do flip up easily. I have rather large lenses, which these almost completely cover. They are quite thin, which is both good and potentially bad. I don't feel as though I have a second pair of glasses on face face, so that's good, but I am concerned about their durability long term.