Color-changing lenses are becoming increasingly popular because they not only provide UV protection, but are also suitable for daily wear. The most important point is to meet the needs of different groups of people, such as presbyopia, myopia, flat light and so on.
So, how to buy a good pair of color changing lenses?
1, look at the discoloration
At present, the market is divided into base variation and membrane variation according to the production process.
Colloquially, a fundamental change is a film change in which a chromotropic dye is added to the lens material and a chromotropic agent is applied to the surface of the lens.
The discoloration of the base change is on the lens, and the discoloration of the membrane change is on the membrane layer on the lens surface.
Since the discolation part of the membrane lens is on the membrane layer, it is not subject to material restrictions. No matter blue light protection, ordinary aspheric surface, 1.67, 1.74 high refractive index and so on, the membrane lens can be processed into a film lens, and consumers have a large choice.
2, color uniformity
At present, the film color changing lens is uniform in the process of color changing without color difference, so the film color changing lens has more advantages and better wearing effect.
3, color stability
A good chameleon will automatically adjust the color depth of the lens according to the change of light, and will return to the transparent state when indoors, which is the same as the ordinary lens, to ensure the high transmittance of the lens.
Color change the whole process without feeling, seamless switching.
Post time: Sep-17-2022