How to lighten the color of brown spectacle lenses

Tinted lenses. The response to light is affected by temperature. The decrease in temperature alters the "viability" of the photochromic reaction, which slows down the recombination reaction – the reaction in which the lens restores light transmission – and delays the discoloration time. Therefore, in a cooler environment, color-changing glasses.

When exposed to light, the discoloration will be larger, and it will appear darker.

Tinted lenses, also known as "photosensitive lenses". The glass lens is added with silver halide, but at present, the mainstream is resin self-tinting lens, adding chemicals such as pyrispiron rings to the acrylic resin lens, so that the originally transparent and colorless lenses will become tinted lenses when exposed to strong light, so they are suitable for indoor and outdoor use at the same time.

Chromic lenses are made of optical glass containing silver halide microcrystals, according to the principle of reversible reaction of photochromatic interchange, in daylight and ultraviolet light.

It can be rapidly darkened under irradiation, completely absorbing ultraviolet rays and visible light.

Neutral absorption; Back in the dark, it can quickly restore colorless transparency.

Color-changing lenses are mainly used in open-air fields, snow, and indoor workplaces with strong light sources to prevent damage to the eyes caused by sunlight, ultraviolet light, and glare.

Hello, if your lenses are not self-tinting lenses, but fixed brown tinted lenses, then only continue to wear, after a long time will become lighter, but this time will be different according to the quality of the lenses, fast half a year, slow two years, so if you do think the color is a little dark, first match another pair, according to the current color and the opticians to tell them, let them order a little lighter. If it's sunglasses, you'll have to buy another pair.

Color changing tablets are divided into bottomed and bottomless! The bottom discoloration means that the lens itself has a little light color before it changes, which slightly affects the light transmission of the lens! Generally, the color-changing film is mostly discolored at the bottom!

Bottomless discoloration means that the lens has no color at all before it changes, and it is the same as the general myopia lens, with high clarity! Like Essilor color-changing tablets, Weixing bottomless color-changing tablets, etc., are all bottomless color-changing! Brown has a bottom color change that means that the lens has not changed before a little light brown, and with the increase of light intensity, it gradually becomes dark brown!

Bottomless discoloration is no color before it has not changed, and there must be color after it has changed, or how to call it a color-changing film, it is the same as ordinary myopia glasses before it has not changed! As the intensity of sunlight changes, the color is basically the same as the sunglasses at the darkest, and of course you can see it!

Hello, let's tell you the principle of the photochromic lens first: the photochromic lens is to add an appropriate amount of silver bromide and copper oxide microcrystallites to ordinary glass. When exposed to strong light, silver bromide decomposes into silver and bromine.

The tiny grains of silver that decompose appear in a variety of colors. Turning tea, turning gray, turning purple, etc. When the light is dimmed, silver and bromine are catalyzed by copper oxide, regenerating silver bromide.

As a result, the color of the lenses has become lighter again. Some color-changing lenses mainly rely on ultraviolet radiation to change color, and they lose their color-changing function after being covered by some anti-ultraviolet objects, for example, some drivers and friends will find that the color-changing lenses cannot change color when they are driving in a good car.

The second point: the quality of the self-tinting lens determines the speed of discoloration and the speed of fading.

The third point: the tinted lens will form a little bit of undercolor after a long time, the main reason is because of the chemical function of the injected material in the lens, relatively speaking, the better self-tinting lens will have a better discoloration effect, and it is also durable.

Hope it helps.

Ordinary color change tablets are like that. Fading is slow!