In my case, it only took 1 incident to make me cautious. Years ago, I was at a small (50 ft) indoor shooting range. A bullet fragment came back and hit me in the glasses. If I didn't have them on, who knows, I might be blind in that eye. Now, due to age/eye issues, my glasses are too expensive as it is to make them safety glasses. The Uvex safety glasses work fine, are inexpensive and if I think that there might even be a remote chance that something can hit the safety glasses, I will wear them.