A low cost way to make anything bifocals
I have sunglasses and a cycling visor that are great for the sun and wind, but I can't see near.  Thus I struggle with vision decision like "do I really need to see the speedometer"?  It also makes me memorize button placement.  All typical old-eyes problems.  I got 2 sets and one enhanced my sunglasses and the other my riding visor.  I can now see near and far.  Getting a satisfactory placement is the only thing I struggle with.  Once in place, vision through them is clear and magnified.
Rating: 5 stars