Summer has arrived, and many friends who wear glasses are deeply affected by strong ultraviolet rays, such as reflection, glare, and various discomforts. However, when they take off their glasses and put on a pair of sunglasses, they can't see anything. So many partners choose to prepare color-changing lenses, polarizing clips, prescription sunglass near-me lenses, and so on.

Colored lenses are divided into pre-dyed lenses and pre-dyed sunglasses near me now lenses for myopia. The former involves dyeing the finished lenses. The latter, because it directly produces colored finished lenses, has high color stability and color fastness, and stable and reliable optical indicators. However, the complex process results in higher costs, and naturally, the market price is also relatively expensive.

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. Normal light will return to the transparent lens, making sunglasses near me now suitable for both indoor and outdoor use.

Color-changing lenses are divided into two categories: substrate color changing and film color changing. The substrate color-changing technology is relatively mature and stable, and the cost is lower than that of film color-changing. However, the color change restoration speed is slower, and lenses with higher degrees may have slight color differences due to the thin center and thick edges of the concave lens (which can only be noticed upon closer inspection), that is to say, there is a slight difference in transmittance.

Film color-changing technology is also a relatively stable technology, with a faster color-changing reduction speed than substrate color-changing, and will not affect the transmittance due to the thickness of the lens.