Hm?

You are blaming some kinds of lens fogging for your M/c accident?

I spent quite a bit of time in my youth (and even into my middle age driving motorcycles - not so much recently, but not really opposed to the idea. and surely in some locations, driving MC/scooters can be quite practical, convenient and surely fun).. .when I was really young, fuck I was a risk taker and overall just have to say that there was some luck to get through that period without any major life-diminishing encounters with either moving or stationary objects.

By the way, I know about lenses fogging too, so I would not even have had been questioning your rendition of blame (at least in part).  

I recall that frequently I would drive with my helmet visor up (especially at night.. and part of the reason did have to do with some of the fogging that would happen if I put it down), and I would just use the plastic windshield on the motorcycle as a means to block the vast majority of the road wind, and I was on a somewhat country highway and going about 50mph/80kmh.. and in some miraculous kind of a way, some kind of bug ended up hitting me between the eyes, very close to my right eye, and did not even hit the eye, but that impact was so painful and debilitating to my eyesight.  It was like all of a sudden going blind but still being able to force a wee bit of eyesight (but not easy because both eyes were tearing and really wanting to close).. I was so fucking lucky that I was able to stop. .and in a kind of almost blind state in the middle of nowhere, and I did not even fall of the motorcycle.. another lucky thing that I was barely able to do and to muster enough muscle movement to accomplish.

Once I stopped, I did recover within about 5-10 minutes and I was even able to open both eyes and stop them from continuing to tear.  Luck sometimes.. and surely I did not stop riding motorcycle from that, and I did not even stop putting my visor up either, but it only happened once in my many thousands of hours of overall ride time.