Like A Human Nemo (one-eyed)

I was windsurfing in the ocean yesterday when I noticed that my prescription sunglasses were beginning to fog up. I pulled them away from my face to allow air to get at the lens, but the lens then popped out and fell into the abyss. Ack.

I now have one and a half pairs of glasses on the bottom of the Iles de la Madeleine ocean. I have a pair or two at the bottom of the Washademoak. I have a pair somewhere under the St.John River.

So, would someone please invent watersports sunglasses that float and have lenses that don't magically pop out? I'll be your first customer.