| Product Name: | Sunglasses |
| Size: | 15*4*4 cm |
| Weight: | 55g |
| Lenses Material: | Acrylic |
| Frame Material: | Alloy |
| Age: | Adult |
| Logo: | Printing, stamping, laser engraving or customized |
| Lenses Optical Attribute: | Tinted |
| Frame Color: | Black, Gold, Silver |
| OEM/ODM | Accepted |
| Features: | UV400 Protection, High defination vision,Blocking glare |
Color changing sunglasses
It is usually colorless and transparent indoors, but when exposed to sunlight, it quickly turns gray or other colors. The color of this kind of sunglasses can automatically become darker or lighter with the intensity of sunlight. This is due to the addition of a small amount of silver halide as a sensitizer and a trace amount of copper as a sensitizer in the color-changing lens. This kind of lens that automatically adjusts the brightness and darkness can be ground into a lens for correcting vision with power, and is suitable for use by patients with myopia and hyperopia. Unfortunately, its power cannot exceed ±3 diopters (commonly known as 300 degrees), because no matter how large the power is, the difference in thickness between the center and the edge will result in a huge difference in the color of the sunglasses.
