The color-changing lens automatically changes the color according to the change of sunlight intensity to protect eyesight, improve aesthetics, and reduce the irritation and damage of sunlight and ultraviolet rays to the eyes. When choosing color-changing lenses, it is impossible to choose only the right color without choosing high-quality lenses. Let's follow the editor of Single Vision Photochromic Darker lens to see how to identify the pros and cons of knowledge!
1. The surface of the high-quality color-changing glasses lens has no scratches, abrasions, rough surfaces, or pits. The lens is obliquely obliquely facing the light, and the finish is extremely high. There are no spots, stones, streaks, bubbles, cracks inside the lens, and the lens is bright and transparent.
2. The thickness of the two lenses of the color-changing lens should be the same, not one thick and the other thin, otherwise, it will affect the vision and damage the health of the eyes. The thickness of the single lens should also be uniform. If it is a color-changing plan lens, the thickness should be about 2mm with smooth edges.

3. There is no feeling when wearing, no dizziness or swelling, no blur or deformation of the observed object. When buying, hold the glasses, see through the lens with one eye, and shake the lens up and down, so that the distant objects should not have the illusion of movement.
4. Fast discoloration speed: high-quality color-changing lenses have a quick response to the environment. Put the color-changing lenses under sunlight for about 10 minutes, that is, a large color depth should be achieved, otherwise the quality of the discoloration is poor. Move the glasses that have been discolored under the fluorescent lamp to a dark place, and the lenses whose rejuvenation time does not exceed 20 minutes are high-quality color-changing lenses.
In summary, the editor of Single Vision Photochromic Darker lens tells: a brief introduction to the pros and cons of color-changing lenses.