As a glasses wearer, I’m a fan of these from NoCry. Despite what the picture shows, the earpieces sit above the earpieces of my glasses so they don’t give me a sore spot above the ear like some safety glasses do after wearing them 5 days straight. They’re a bit pricey if you order them from the website, but I’m pretty sure I got them on sale at a local hardware store for a heavily reduced price.
With my last pair of glasses at competition I would wear hard plastic side shields* on my backup pair of glasses. Technically the glasses weren’t Z87 rated so they weren’t safety glasses, but in my role at competition I really only need safety glasses if I’m getting hit in the face with a flying game piece and to appease the safety advisors. The polycarb lenses wouldn’t shatter if I got hit with a game piece (and if my backup pair got a scratch I don’t mind so much) and they kept the safety inspectors off my back. My current pair of glasses are more square than the previous ones so the side shields don’t fit on them properly.
When I’m in the shop I wear the real safety glasses when working with dangerous tools or mechanisms. Side shields really won’t protect your eyes from flying chips, saw tooth blades, grinder wheels, flywheel shrapnel, etc.
* Like these. The thin flexible plastic ones do absolutely nothing to protect your eyes and are pretty uncomfortable.