My problem with reading glasses: I never seem to have mine when I need them. Marc Singer, the woodworker who invented Gorilla Glue, experienced this enough times that he created a pair designed to be on-hand (or on-wrist) at all times. Using a mechanism designed by his son, a structural engineer, the Singers' EyeWris glasses essentially turn into a slap bracelet. They're up on Kickstarter:
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At first glance I wrote these off, thinking I'd accidentally break these on day one. But here on the farm I routinely keep my watch on while doing manual labor, working on the truck, and in my shop, and it has nary a scratch on it.
I'm also very curious as to how those little nubs feel on your temples, and whether or not the anti-smudge coating on the lenses is good enough to avoid getting greased up by sweaty wrists.
In short, I'm curious--but I'm fifty-bucks-curious, not $125 curious. So I'm on the fence as to whether or not I'll pledge. At press time they had $17,700 in pledges on a $25,000 goal, and I've got 39 days left to decide.