Interesting color changing lenses

Photochromic lenses, also known as "light - sensitive lenses", mainly function to protect the eyes and reduce visual fatigue by reducing the entry of strong light, ultraviolet rays, and blue light into the eyes. Substances sensitive to light, such as silver halide, are added to the lenses. When irradiated by ultraviolet rays and short - wave visible light, the lenses darken, and the light transmittance decreases. Indoors or in dark places, the light transmittance of the lenses increases, and they fade back to a clear state. The photochromic property of the lenses is automatic and reversible. Photochromic glasses can adjust the light transmittance through the color change of the lenses, enabling the human eyes to adapt to changes in ambient light.

 Photochromic lenses generally turn grey or brown. Currently, colored photochromic lenses are also available on the market, such as blue, purple, green, etc. These lenses are suitable for people who often engage in outdoor sports or those who work outdoors for long periods and need to face various types of light. When the ultraviolet rays are intense, they can block the harm to the eyes, providing a more comfortable wearing experience. When worn indoors, the lenses have high light transmittance, which does not affect normal life and work, making them very convenient to use.

In addition, photochromic lenses can be combined with blue - light - blocking and polarizing functions, providing consumers with more options.

Blue - light - blocking photochromic glasses