With this pair of helmet safety goggles from Lancer Tactical, you can prevent BBs from damaging your eyes. The lens is made of smoked polycarbonate, an impact-resistant material that you can find in industrial applications. BBs will barely scratch it if a steel hammer takes more than several blows to break this material.
The lens is double-layered and anti-fogging, allowing you to keep track of your surroundings at all times. You also wont feel discomfort as the soft foam padding keeps the goggles snug. If you own a BUMP-style helmet with side rails, this is a solid choice for completing your loadout.