Prescription Safety Glasses vs Prescription Sports Glasses

Why are you using safety glasses _over_ prescription glasses?

Get prescription safety glasses.

My current sets (Both bifocal, one distance/inter the other inter/near) are from glasses uk:-

If you're embarrassed about wearing safety glasses in public, you can knock out the plastic rivets that hold the side shields on and no one will know that you've got an honest job.

Mark Rand (replied via PM as well) RTFM

I only wear glasses for reading and machining, which is why I've never bothered with prescription safety glasses before now, as the machining I do is only a hobby. Hence the 'larger' non-prescription glasses over the top.

However, I like the idea of a more modern wrap-around over the traditional style, and as these are widely available for sports, and the wrap-around gives a degree of side ingress protection, I want to know what the difference is.

Peter

I'm not sure about the ASTM numbering but safety specs in the UK are regulated by BS.EN166 which has a whole bunch of categories depending on what the expected hazard is. There are different types for e.g. chemical splashes or high velocity particles. So for example BS EN 166 3 9 B denotes protection against liquids (droplets or splashes), molten metals and hot solids and medium energy impacts.

There's quite a good explanation at:

Interesting read. Thanks Norman.

Peter, I tend to wear a full face shield, rather than safety specs, never really got on with safety specs. something like:

Dave