It's not an invention, really, it's a hack. Who you gonna sue? The guy in the picture? The flyswatter manufacturer? I dunno.
BTW- I don't see how in the heck a thingamabob on your glasses is going to make you cross-eyed. I call gold-digger!!EDIT
- All right, I fell for it. You guys are too much...http://en.wikipedia.org/wiki/The_Jerk