Sunglasses
device · 1929 · Electric age
Glasses with tinted lenses.
What it is made of
- Polarizing filter — has part. Polarized glasses.
Principles and materials it uses
- Ultraviolet — uses. A UV filter.
- Glass — is made of. The lenses are tinted glass.
- Celluloid — is made of. The frames are celluloid.
History: what it evolved from and what it influenced
- Glasses — evolved from. Glasses with dark lenses.