1. Different definitions
Polarizer: Polarizer is a lens made based on the principle of polarization of light.
Sunglasses: Sunglasses refer to lenses that block strong light and reduce the intensity of ultraviolet rays.

2. Different functions
Polarizer: Used to exclude and filter direct light from the beam, making the vision clear and natural.
Sunglasses: Used to cover the sun and reduce the damage of light to the eyes.

3. Different principles
Polarizer: Polarizer works on the principle of polarized light, so the objects you see will not change color.
Sunglasses: Ordinary sunglasses use their dyeing to block all light. The object you see will change the original color of the object. The color of the object will be the same as the color of the lens.

4. Different materials
Polarizer: Made of fiber sandwiched with polarizing film.
Sunglasses: Optical glass polarized sunglasses.

5. Use different
Polarizer: Mostly used in sunglasses and camera lenses.
Sunglasses: mostly used for sun visors, light-colored mirrors and special-purpose sunglasses.

6. Different levels of protection
Polarized glasses: Polarized glasses can completely block glare and achieve true eye protection.
Sunglasses: Sunglasses cannot prevent glare from damaging your eyes.

7. Different degrees of blocking ultraviolet rays
Polarizer: UV blocking rate reaches 99%
Sunglasses: Ordinary sunglasses have a fairly low barrier rate.