alot of fields will enforce "full seal" goggles such as paintball goggles.
others will be contempt with ballistics glasses or goggles.
all depends where you play, and what the field prefers and enforces
personally i play with paintball goggles and a bandanna that doubles as neck protection as well as face protection.
"You know what the chain of command is? It's the chain I go get and beat you with 'til ya understand who's in ruttin' command here."