I was reading about Pyramex's G204 Google, and don't understand the first bullet. Please see the question in the title.
Features
- Chemical splash goggle features vent caps to restrict influx of liquids.
- Scratch resistant polycarbonate lens provides 99% UVA/B/C protection.
The Reddit comments below don't clarify if vented googles, indirect or direct, resist liquid and gas. They appear to imply that a direct shot or spray into the vents can still infiltrate the goggle.
Good chemical splash goggles? : chemistry
Indirectly vented goggles have an air-lock type system to prevent a direct spray shooting into the goggle if you do get splashed in the face.
Good chemical splash goggles? : chemistry
I think indirectly vented means there is no straight line a drop of liquid or particle can follow to get past the vent holes.
The requirement of closed goggles might also be safety theater, most splattering hits the lenses first. I have walked around labs for months and nothing hit my goggles.
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