Color changing lenses are glasses that automatically produce color changes in response to changes in ambient light. Color changing lenses become darker and their light transmittance decreases when exposed to ultraviolet and short wave visible light in sunlight; The light transmittance of the lens increases indoors or in the dark, causing fading and brightening. The photochromism of lenses is automatic and reversible. Color changing glasses can adjust the transmittance by changing the color of the lens, allowing the human eye to adapt to changes in ambient light, reducing visual fatigue, and protecting the eyes. Is it good to wear color changing patches for a long time?
1、 The principle of color changing lenses
1. Color changing lenses automatically change color according to changes in sunlight intensity to protect vision, improve aesthetics, and reduce the irritation and damage of sunlight and ultraviolet rays to the eyes. When color changing eyeglass lenses are exposed to ultraviolet rays, their coating layer immediately blocks the invasion of ultraviolet rays while rapidly deepening, greatly blocking the damage of UVA and UVB to our eyes.
2.When exposed to strong sunlight, color changing lenses will turn gray or brown, absorbing visible light transmittance and reducing irritation and damage to the eyes, especially the retina. When you return indoors, it will gradually become a transparent lens that can be used indoors. Color changing lenses are suitable for people who frequently engage in indoor and outdoor activities. If you are working in this environment, you can definitely use color changing lenses.
3. Outdoor, the color can be automatically adjusted according to the strength of ultraviolet rays, reducing glare, slowing down eye fatigue, and 100% blocking ultraviolet rays A/B. From indoors to outdoors, full line of sight provides comprehensive protection, maintaining visual comfort and long-term eye health.
2、 Are color changing lenses good for the eyes
1.Firstly, color changing lenses are designed to better protect our eyes. We all know that ultraviolet radiation can "sunbathe" the surface of the eyes, and the long-term accumulation effect can directly lead to various eye diseases. For example, photokeratitis can also cause benign macular degeneration on the surface of the eye. Triggering two other common eye diseases, pterygium and blepharoplasty.
2. Color changing lenses can not only darken and brighten with the intensity of light, but also absorb harmful ultraviolet rays to the human eye. If all the window glass is replaced with photochromic glass, the sunlight cannot enter the room on sunny days; On cloudy days or in the morning or evening, the outdoor light is not blocked, and the indoor space remains bright and clear. It's like hanging automatic sunshade curtains on every window.
From the above, it can be seen that color changing lenses are still very practical. If you often go out and find it troublesome to wear two pairs of glasses (regular glasses+nearsighted sunglasses), then this one is more convenient. It is transparent indoors and dark outside, which not only does not affect daily use, but also protects the eyes from UV damage. Because the color changing principle of these lenses is UV irradiation, the color change is generally fast, and the recovery time depends on the degree of color change, usually 2-4 minutes.
