Alan Bean on the moon wearing a helmet with a visor

A visor is a surface that protects the eyes, such as shading them from the sun or other bright light or protecting them from objects. Types of visors include:

• A type of hat consisting only of a visor and a way to fasten it to the head.
• Any such vertical or horizontal surface on any hat or helmet.
• The part of a helmet in a suit of armor that protects the eyes.
• Devices in an automobile that the driver or front passenger can lower over part of the windshield to block the sun.