Glasses processing factory: Yes, sunglasses need to be replaced periodically, and the lenses of sunglasses will also expire.
When the sun is bright and the light source is strong, many people will use sunglasses to protect their vision. However, it is emphasized that the sun protection and isolation ability of sunglasses will decline over time. If the average person wears sunglasses for 2 hours a day, their UV resistance will decline after about 2 years. If someone habitually wears sunglasses for a long time, it is best to replace them for a long time to protect their eyes.
The eyeglass processing factory stated that even if the sunglasses are carefully maintained and there are no scratches on the mirror glass, the sun protection coating on the mirror glass will still be affected by depreciation costs and storage habits; Sweat, tears, sebaceous glands contaminated with the skin, or excessive cleaning can slowly flow out. Without this UV resistant building coating, sunglasses will expire and cannot fully utilize their ability to block ultraviolet light in a reasonable way.
The eyeglass processing factory further stated that although the public has knowledge about color and feels that darker colors are more resistant to strong light, just like dark brown mirror glass can reduce the irritation of the sun to the eyes, in fact, dark brown eyeglasses cannot reasonably isolate the tiring ultraviolet light. Just like some people who may have darker skin but still accept exposure to sunlight, the same principle applies to their skin, and the damage is even more profound.
The more people wear sunglasses, the more they must be removed and replaced. The reason depends on the recognition by both eyes that there is a layer of dark colored glasses on the outside. As the number of light sources entering the eyes decreases, the pupils will naturally become larger. At this time, ultraviolet light can take advantage of the opportunity to enter, which is more likely to damage the glasses for myopia. Sunscreen isolation is like an illusion, which can seriously harm the vision and physical and mental health of the eyes.
The glasses processing factory has determined that sunglasses should be reasonable and must be integrated with anti UV coatings. Some sunglasses that are designed to resist UV rays but appear to be nearsighted can actually resist UV attacks if coated with appropriate building coatings, and cannot be distinguished by color intensity.
