Apollo 12 astronaut Alan Bean, wearing a helmet with visor, during the second moonwalk EVA near Sharp Crater.[1]Sports visor designed in Seoul, South KoreaAn Arai GP5 racing drivers helmet tinted visor
A visor (also spelled vizor) is a surface that protects the eyes, such as shading them from the sun or other bright light or protecting them from objects.
Nowadays many visors are transparent, but before strong transparent substances such as polycarbonate were invented, visors were opaque like a mask.