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2. Motorcycle helmet - Wikipedia

   en.wikipedia.org/wiki/Motorcycle_helmet

   Full face helmet with its visor raised. A full face helmet covers the entire head, with a rear that covers the base of the skull, and a protective section over the front of the chin. Such helmets have an open cutout in a band across the eyes and nose, and often include a clear or tinted transparent plastic face shield, known as a visor, that ...

3. Anti-fog - Wikipedia

   en.wikipedia.org/wiki/Anti-fog

   Anti-fog agents were developed by NASA during the Project Gemini, for use on helmet visors.During Gemini 9A, in June 1966, Astronaut Eugene A. Cernan tested NASA's first space suit, and discovered during the space walk that his helmet visor fogged, among other issues. [2]

4. Eye protection - Wikipedia

   en.wikipedia.org/wiki/Eye_protection

   Lacrosse helmets used in men's lacrosse have a cage to protect the face and eyes from impact. Lifeboatman's helmet has a transparent visor to keep sea spray out of the eyes. Motorcycle helmets and Bicycle helmets have face shields that protects the eyes against wind blast, dust, insects and impact in the event of a crash.

5. Helmet-mounted display - Wikipedia

   en.wikipedia.org/wiki/Helmet-mounted_display

   Software correction accommodates the display position, providing an accurate image to the pilot and allowing the Scorpion HMCS to be installed onto a pilot's existing helmet. A visor can be deployed in front of the display providing protection during ejection. The visor can be clear, glare, high contrast, gradient, or laser protective.

6. Visor - Wikipedia

   en.wikipedia.org/wiki/Visor

   Nowadays many visors are transparent, but before strong transparent substances such as polycarbonate were invented, visors were opaque like a mask. The part of a helmet in a suit of armor that protects the eyes. A type of headgear consisting only of a visor and a band as a way to fasten it around the head. Any such vertical surface on any hat ...

7. Visor (armor) - Wikipedia

   en.wikipedia.org/wiki/Visor_(armor)

   The first recorded European reference to a helmet's visor in the Middle Ages is found in the 1298 will of Odo de Roussillon, which speaks of a heume a vissere. [4] Whether this statement refers to a pivoting visor or a fixed faceplate is not clear; but by the early fourteenth century artistic depictions of moving visors appear quite frequently. [4]