Well, finally something I can bring to the party...

I have used the stick on bifocals...they are a great idea that doesn't work. I have tried them 3 different times over the last years and each time I have learned that they have not improved.

HOWEVER, I have also tried inexpensive bifocal sunglasses. They are available for around $25. They are excellent. I wear them on every bike ride so I can see ahead - clearly, and look down and read my computer. They work - great. I have also bought bifocal safety sunglasses that work well as well. I purchased my bifocal readers from Ritzyreaders.com. I found them on the sport section of the site. I have also recently seen bifocal sunglasses made by Maui Jim which go for about $200.