the.com/visor
A tiny roof for your face, fighting the sun one glare at a time.
means A stiff projecting brim or movable shield on a cap, helmet, or vehicle that blocks sun and glare from your eyes.
from From Old French 'visiere,' the hinged front of a helmet, built on 'vis' meaning 'face' (from Latin 'visus,' a sight or seeing, related to 'videre,' to see). So a visor was first the part of armor that guarded the face — and it still keeps the same job, now defending eyes from the sun instead of swords.
medieval originKnights' helmets had visors before sunglasses existed
astronaut goldSpace helmet visors coated in real gold film
car stapleSun visors became mandatory equipment in many places
word rootFrom Old French 'vis,' meaning face
poker tellDealers and gamblers wore green visors to cut glare