How Much Do You Know About Color-changing Lenses
Jul 13, 2021
Bright light can cause eye fatigue and pain. For example, working in a strong light environment, these strong light will irritate the eyes, causing eye fatigue, dryness, tears and so on. These discomforts can aggravate eye fatigue, even pain, and cause visual impairment. Although the color-changing lens is for strong light, the pupil of the human eye will automatically shrink to block part of the strong light intake, but after all, it can only block part of the strong light, so people stay in the dark for a long time, once they turn to the outdoors to brighten It will feel very uncomfortable in places where you may even need to squint or block the light with your hands.
The color-changing lens specifically solves the change in the light intake of the eye in the alternation of light and dark. To put it simply, under the strong light of the color-changing lens, the color-changing lens blocks the strong light and protects the eyes from the damage of the strong light; in the place where there is no strong light and ultraviolet rays, the color-changing lens restores to a transparent color, thereby ensuring the passage of normal light.
The color-changing lens is made by adding silver halide to the lens. It will decompose when exposed to ultraviolet light and block the light from passing through. There is no ultraviolet light during synthesis. There are two processes for color changing paper:
One is to directly add a color-changing material to the lens material, which is called basic change;
One is to coat a layer of color-changing film on the surface of the lens, which is called film change. The base color changes slowly and has a certain background color, while the film changes color time quickly and has no background color. After all, there is a color-changing substance in the base, so if the two eyes are too different, the color of the two lenses will be different. It is recommended that the anisometropia of the two eyes should not exceed 2.00D d. Recommendations for choosing color-changing myopia lenses: The color-changing myopia lenses will be darker outdoors, but will automatically adjust to a brighter color indoors. It takes a certain amount of time for ordinary color-changing lenses to change color. During this process, the eyes may be tired from seeing things. Therefore, it is better to choose film lenses!
The common colors of color-changing lenses on the market are tea and gray. Consumers can choose according to the function of the color-changing lens, the use of glasses and their own color preference.
