5 In 1 Clip On Sunglasses/Shades Polarized Magnetic For Driving And Outdoor Sports

Sunglasses, also known as sunshades, are used for shading. People usually need to adjust their pupil size to adjust their light flux when exposed to sunlight. When the intensity of light exceeds the human eye's ability to adjust, it can cause harm to the eyes.
Lens classification
The types of sunglasses lenses are roughly divided into five types: anti reflective protective lenses, colored lenses, coated lenses, polarized lenses, and color changing lenses.
1. Anti reflective protective lenses: This type of lens is coated with a thin layer of magnesium fluoride on the surface to prevent strong light reflection, making things clearer and less affected by strong light interference. To check if your sunglasses really use anti reflective protective lenses, you can aim your glasses at the light source. If you see purple or green reflections, it means that the lenses are indeed coated with anti reflective protective film.
2. Colored lenses: also known as "dyed lenses", refer to the process of adding some chemicals to the lens to present color and absorb specific wavelengths of light during the lens manufacturing process. This is the most commonly used type of lens for sunglasses.
3. Colored lenses: This type of lens presents the same effect as colored lenses, but is made in a different way. It applies color to the surface of the lens, and is most commonly known as the "gradient colored lens". The color is the darkest on top and then gradually lighter down. Generally, sunglasses with a certain degree are processed by coloring the lenses.
4. Polarizing lenses: In order to filter out the dazzling light from the sun in equal directions on water, land, or snow, a special vertical coating is added to the lens, which is called a polarizing lens. Most suitable for outdoor activities such as sea activities, skiing, or fishing.
5. Color changing lenses: also known as "photosensitive lenses". Because silver halide chemicals are added to the lenses, the originally transparent and colorless lenses will turn into colored lenses when exposed to strong light for protection, making them suitable for both indoor and outdoor use.