Color-changing lenses are a type of discount prescription glasses product that can be worn around the clock. The lenses are colorless indoors and darken outdoors according to the intensity of ultraviolet rays in different seasons and weather conditions.

It can protect the eyes from UV damage and provide good visual effects in strong light, making the light softer.

Color-changing lenses, also known as "photosensitive lenses". Because the chemical substance silver halide is added to the lens, the originally transparent and colorless lens will turn into a colored lens when exposed to strong light for protection, making discount eyeglasses online suitable for both indoor and outdoor use.

Color-changing lenses can automatically adjust the transmittance according to the strength of light, keeping the eyes in the best light condition and greatly improving comfort.

Color-changing lenses also solve the problem of sunglasses not being able to be worn indoors and having to change glasses frequently when entering and leaving the room. A pair of color-changing mirrors that do not need to be replaced indoors or outdoors, bringing great convenience to daily life.

The surface of high-quality color-changing lenses is free of any scratches, abrasions, rough surfaces, or pockmarks. When viewed diagonally in front of the light, the smoothness is extremely high. There are no spots, stones, stripes, bubbles, or cracks inside the lens, and the light transmission is bright.

The two lenses of color changing the cheapest eyeglasses online must be of the same color without any difference. The color change should be uniform and not present multiple colors. There should be no "yin-yang color". When exposed to sunlight, the color change time is fast, and when there is no sunlight, the fading time is also fast.