Don't try this at home
I was driving home from dinner with Claudia and while waiting at a traffic light, I blinked and my contact lens fell out. This is notable because 1) I only wear one - in my bad eye; the other eye is worse and 2) my contact lens correction is -11.5 diopters(*). It was only .2 miles of really easy driving, but I didn't pull into the garage. I went in, got my glasses and then drove to the other end of the complex to get the mail. During that short drive, I remembered why I hate to wear my glasses out of the house - I now have a headache and am a touch dizzy.
Anyway, no cars or people were harmed in my getting home and if it had been any further than it was, I would have pulled over and called a friend to come get me.
I'm going to get new glasses ordered this week and see if that helps with the wearing glasses for non-reading activities.
(*) There is no conversion between diopters and visual acuity on the eyechart (20/20, 20/30, etc.). In other words, if you are left with -1.50 diopters of residual nearsightedness you may see 20/40 with that eye in the distance, or you may see 20/100, 20/80 or 20/50. [This answer was googled.]





Scary! Glad you got home safe!
I'm nearsighted, and my prescription is -3.5. I can't see past the end of my hand when I hold it out in front of me.
If I don't have my lens in or my glasses on, I can see (clearly) about 5" from the end of my nose. Except because my lens had been in, things were not nearly as blurry as I would have expected. I could recognize other cars and the traffic lights. I was already in the right-hand lane (where I needed to be) and could tell by the coloration where the curb was. So I made sure I didn't drift to the left for 2 blocks and then got off the main road and onto the side street that my side street is off of.
I did consider pulling over but I wasn't sure that I could do that much before where I needed to turn right so I stuck it out.