The lens of color-changing glasses contains silver halide crystallites. When the lens is exposed to ultraviolet rays, the halide ions will release electrons, and when these electrons are captured by the silver ions, a reaction will occur. The colorless silver halide in the lens will decompose into Transparent halogen atoms and opaque silver atoms, silver atoms will absorb light, making the light transmittance of the lens lower and lower, resulting in discoloration. After leaving the light, silver atoms and halogen atoms will recombine, and the lens will return to a colorless state.
1, also known as sun glasses. It is mainly used in the open field, snow, and indoor strong light source workplaces to prevent damage to the eyes from sunlight, ultraviolet light and glare. Color-changing glasses mainly change colors due to the intensity of light. Generally, there are several colors such as tea, red, blue, gray, etc. The brightness of objects seen through color-changing glasses will be dim, but it will not affect its brightness. The original color is suitable for people who often need to work outdoors.
2. The benefits of wearing color-changing glasses: When a person wears color-changing glasses and walks indoors from the sun, the sudden change of light and color gives the eyes a feeling of fatigue, and people with a high degree of myopia have a fatigued eye. The ability itself is relatively weak, so it is recommended that people with high eye degree wear such glasses. Since the added silver halide and copper oxide have been integrated with the optical glass, the color-changing glasses can be repeatedly discolored and used for a long time, which can not only protect the eyes from strong light stimulation, but also play a role in correcting vision. In general, color-changing myopia glasses have a certain impact on human eyes. Therefore, if the short-sighted want to become more fashionable, you can choose to wear color-changing myopia glasses, but they must be regular, large-scale optical stores to buy them glasses.
3. The advantages of the color-changing film to filter the strong sunlight in the past actually outweigh the disadvantages. You only need to pay attention to one thing: when the sky is gloomy and dim in winter, do not wear color-changing lenses. Although the sky is dark in cloudy days, the ultraviolet rays are still some. At this time, the temperature is low, and the color of the color-changing lens will become extremely dark. It is dark and dark at the beginning, which will cause the pupil to dilate. The pupil will dilate for a long time. If your anterior chamber is relatively shallow, it may lead to glaucoma. This is The biggest harm of photochromic lenses is that they have never experienced sunlight. It is not worth mentioning. In addition, photochromic lenses have two disadvantages: because many cars are covered with films, photochromic lenses will not change color in the car. The higher the temperature Low, the better the discoloration effect, so on the day when the sun is not very strong, the discoloration film can become very deep. In the summer when the sun is dazzling, the discoloration effect is not satisfactory. Even the best Transitions discoloration is not very good. Solve the second problem.
