Characteristics of color-changing lenses
Jul 02, 2021
1. Discoloration rate of the color changing lens
The rate of discoloration of color-changing lenses is a key reference element for the purchase of color-changing lenses. The faster the fading rate of spectacle lenses, the better. For example, from a dark room to a brightly lit outdoor, the faster the fading speed can be to immediately prevent the damage of strong light/ultraviolet light to the eyes.
Generally speaking, the fading rate of the film fading technology is faster than that of the substrate fading technology. For example, the new film fading technology, the photochromic factor uses spiropyrans, which have stronger light responsiveness, and use the molecular formula itself to flip open and close to complete the basis or block the actual effect of the light source, so in The fading rate is rapid.
2. Discoloration uniformity of the color-changing lens
The color fading uniformity of the color-changing lens refers to the uniformity level of the color of the spectacle lens during the whole process of the change of the color of the spectacle lens from light to dark or from dark to light. The more uniform the fading, the better the color-changing lens.
Traditional substrate color-changing lenses, the photochromic factor is on the spectacle lens sheet, and the actual effect of color fading will be harmed by the thickness of the spectacle lens in different areas. Because the eyeglass lens management center is thin and the surroundings are thick, the eyeglass lens management center area fades more slowly than the surrounding area, and the effect of dark circles appears.
3. Life of color-changing lens
Generally, the lifespan of color-changing lenses is around 1-2 years, but many companies will find ways to increase the life-span of color-changing lenses.
The color-changing lens, like spectacle lenses, will continue to develop the coating solution to strengthen the surface layer after spin coating the color layer. The color loss effect is maintained for a longer time, and the basics can be achieved for more than 2 years.
