This is such an issue, I use a combined helmet and visor......maybe not as much protection but at least you can see when the angle grinder digs into a knuckle
John
You can also rub undiluted shampoo on the surface with your fingers, and polish it off with a soft cloth. Both the goggles and the cloth must be perfectly clean, or you will put a pattern of tiny scratches on the surface. Wash them in clean water with a tiny bit of WUL, never try to clean lenses dry. Builders dust is very abrasive.
If your face is hot and sweaty, wash or wipe it dry first.
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I've gone for stanley wraparound safety specs but I've found stuff (bits rather than dust) can still get past them into my eye so I may go for some goggles and dig out the Sea Drops from my scuba gear. Sea Gold is meant to be pretty good (works for multiple dives).
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