noun
visor
VY-zer/ˈvaɪzər/
A shield or brim that protects the eyes or face.
The visor's projecting brim shades the man's eyes from the sunlight.

Etymology
The ancestor named the front part of a helmet. The word later covered the projecting front of a cap, then an eyeshade protecting against sun or glare.
In context
So ND filters are only needed for daytime, just like you only need a tinted visor for the daytime.
More examples
- The cap's visor keeps the sun out of his eyes.
- I flip down the car's visor to block the glare.
- Workers wear clear visors to protect their faces from splashes.
Forms
visor · visors