Substrate discoloration refers to the uniform filling of color-changing factors inside the discountglasses lens. So, will adding these color-changing factors affect the thickness of the lens?

Just like boiling water, adding edible salt continuously will raise the water level. For the same discountglasses frame, replacing the original transparent lens with a color-changing film will result in a thicker color-changing film after processing, with the same refractive index, luminosity, and pupillary distance.

What other characteristics will also change? Specific gravity, light transmittance, and even Abbe numbers can all have an impact. Raw materials determine the Abbe number, and auxiliary additives optimize the Abbe number.

As an additive for lenses, whether the color change factor optimizes or reduces the Abbe number is a question mark. At present, the vast majority of substrate color-changing materials on the eyeglass mart are also called acrylic.

Speaking of acrylic, it should not be unfamiliar. Its applications are quite extensive, especially in display props. It is not an exaggeration to say that it is used as a raw material for resin lenses.

When it comes to the selection of color-changing lenses, not only consumers but also merchants often overlook one aspect and focus only on the depth and speed of color changes, often neglecting the basic performance of the lenses themselves.

Super tough film layer color-changing lens. Due to an accident, I sat on my glasses and the lenses were fine, but the legs of the glasses broke while sitting! Changing shelves without frames is very troublesome, as two legs have been replaced. You can persist.

Wearing glasses for a long time, even indoors, they can't become as transparent as before. Others mistake them for dark circles under the eyes, which are quite unsightly.