I do the same as you. I do wear prescription glasses. I get the clear, transition glasses at WalMart. Great for when I am going home after working second shift. They also darken automatically during the daytime but I reserve my daytime riding glasses to prescription, polarized, sunglasses that I got from my eye doctor. I was using them initially for when I went salt water fishing but it seemed such a waste to have those quality glasses sitting in a bin with my fishing "stuff" when I could utilize them on a daily basis on my bike. So that is what I now do! :sI have 2 pair of Wiley-X Jakes, one pair is light adjusting, clear enough for riding at night but don't get dark enough for really bright days, I've had them for 4 years and just had to replace the face seal. The other pair is dark polarized and is two years old and holdig up well, they both are very scratch reistant. I will replace them with wiley-x when the time comes.
Kevin