Uh ... when I was a plebe at the Naval Academy, back in 1972, one of the required sports for training during Plebe Year was boxing. Every plebe was required to participate in a four-week course, three times a week, of the Manly-Arts.
Anyway, I have something approximating 20/infinity vision, which is to say that, without my glasses, if I squint, I can just make out the end of my nose. So, when I stepped into the ring for the first time with my glasses on, the coach told me to take them off. Reluctantly, I did so, but I figured that all I had to do was look for a moving object and swing at it.
I was really getting into it, giving as good as I got, when, about halfway through the second of three rounds, I got clocked pretty badly on the side of my head and spun around. I didn't go down, but I was pretty disoriented.
When I cleared my head, I saw my opponent just standing there, so I approached and started laying on a flurry of lefts-and-rights, bobbing and weaving to avoid being struck in return. I was making good solid connections and not being hit at all by any counterpunches.
I thought I was doing pretty well until the bell rang and the coach tapped me on the shoulder and handed me my glasses.
I had spent the last half of the second round viciously abusing the turnbuckles in the corner.
Needless to say, it didn't take too long to get around the rest of the Plebe class and I was called "Eagle Eye" until Youngster Cruise.