May have solved my problem with prescription sunglasses.
First, I gave this product 4 stars because I just tried it today and don't know how long it lasts on my glasses. The reason I bought Nerdwax is because months ago I bought prescription sun glasses and they kept sliding down my nose. Before going on a Florida vacation, I took the glasses to the place where I bought them for an adjustment. Told the sales rep that I had a problem with them because the bridge of my nose is narrow and they kept sliding down. She tightened them up some but told me there was no way she could keep completely from sliding. I was just so frustrated. And despite how attractive the frames were, I felt I had wasted my money on expensive frames. Then, I saw Nerdwax on Shark Tank one Friday night and decided to give it a try. So far, I'm so glad I did.
Rating: 4 stars