Before I needed glasses to actually see, I made my living sometimes standing on the side of I-5, with traffic zooming past only a few feet from me, and I often got hit by rocks or whatever that they happened to throw up from the road. I always wore safety sunglasses, and started wearing clear safety glasses when the sun went down. I had another pair in my workshop, they went on as soon as I walked in the door. Now that I have to wear glasses all the time anyway, that problem is solved. I also carry a pair of GI goggles in my vehicles, just in case I have to get out in a sand storm or something. There are better goggles around, but I already own these, they fit over my glasses, and seal pretty well...
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OBG