so their eyes do not get gouged out by sticks or pucks.
You could wear sunglasses or a visor.
Shut them Wear glasses (goggles) Wear a visor Turn away
I believe that would be called a Visor
you should use a visor when its sunny out, the sun is in your eyes, or your face is sunburned.
the head
The helmet protects the motorcyclist from head injuries, and the visor prevents bugs from getting into the motorcyclist's eyes.
So as nothing gets in your eyes.
The word 'visor' has no antonym. A visor is that part of a helmet which covers the face, or some other type of protection for the face or eyes. It has no opposite, any more than the word 'helmet' has an opposite.
A CAP is a brimless head covering with or without a visor. Examples: a Baseball cap has a visor to protect eyes from the sun; a ski cap is a knitted head covering without a visor.A HAT is a head covering, usually with a crown and a brim. Examples: a fedora has a crown with a crease and a brim; a top hat has a flat top crown and a brim.A visor only extends around the front of the hat while a brim completely encircles the hat.
Sun visor?
You protect your eyes by wearing sunglasses or safety glasses.