I've been wearing eye glasses for a long time. I've reached a point now where I have to look over my glasses to see or read normal text. But, I'm somewhat loathed to admit that I need bifocals the same way that I wouldn't try yogurt and cheese cake for a long time ('yogurt' is just a wrong sequence of letters and a cheese cake is just 'unnatural').
I'm also unsuited to be a hunter because I'm so prone to be lured into my own private world without much effort. My walks back and forth between work and home are 99% absent-minded, so compelling are some ideas and thoughts I miss people waving at me or saying hi 'til it's way too late.
I recently bought a digital camera, and I have found it's like my eye glasses in many ways. It catches things I was completely oblivious to when I took the picture: people doing things that I didn't see. Here is one that illustrates perfectly what I mean: