I’m not clear how anyone else might use them, but the squinting game is handy in literally seeing something more clearly. Squinting alters the amount of light that enters the eye and, therefore, the amount of data that reaches the brain. What is interesting is that the brain has a choice of what to do with that data. I have found my brain responds by filling in the missing data with what is expected in its place. In other words, it creates an image out of memory fragments.