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:-

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: