Products

Special Series

Photochromic Lenses

Photochromic Lenses- Regular photo, Hi UV photo, Transitions photo

Coating:
Uncut
/Hard Coating (HC)
/Multi Coating (AR)
/Super hydrophobic AR (AR+)
/Blue light Cut (BLC)
/Anti-Glare (AG)
/Color Mirror or Mercury
/Tinting any colors

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Photochromic Lenses
They’re the type of lens that transitions to a darker color when exposed to the sun or other sources of UV light.
Photochromic lenses have existed in one form or another since the 1960s. The technology has changed a lot since then, but the fundamental principles remain the same.
In general, these lenses work by using chemical reactions that are triggered by UV exposure. The result of the chemical reaction is a color change in the lens.
The very first photochromic lenses were made of glass and coated with silver chloride and silver halide, among other molecules. These silver compounds underwent a chemical change when they interacted with waves of UV light. The chemical change caused them to darken. The reaction reversed when the UV light was gone.
Today, the lenses are made from several different materials. Proprietary photochromic dyes are added to these materials in a variety of ways. The molecules within these dyes undergo color changes at different rates when exposed to UV light.
The lenses should darken in proportion to the amount of UV light they receive. This means that the brighter it is in your environment, the darker your lenses become.

The purpose of photochromic lenses:
Photochromic lenses are ideal for people who need to wear glasses all day.

**Protect the eyes from UV light.
**Eliminate the need for a separate pair of prescription sunglasses.

The lenses provide complete protection from UVA and UVB rays at all times. This feature doesn’t depend on whether the lenses are clear or dark at any given moment.

Materials of Photochromic Lenses
These days, glass lenses are far less common than newer synthetic materials. Most lenses are made from some type of plastic or resin. The reason is that resins tend to be lighter and sturdier than glass. They’re also harder to scratch and easier to evenly coat or infuse with the photochromic molecules.
There are many ways to produce resins and infuse them with the necessary dyes. This makes them a more flexible material to work with compared to glass.
There are a variety of brands of photochromic lenses to choose from. Different brands construct their lenses from different base materials and dyes.
As the result, even though all photochromic lenses work in approximately the same way, the variations in materials alter the characteristics of the lenses, including their rate of color change.

The photochromic lenses TGT provides:
**Regular photo Gray and Brown
**Sunx Photo Gray and Brown
** 1.59 polycarbonate photo Gray
**Hi UV420 photo gray
**Transitions Gen8 Gray, Brown, and Graphite Green.
**Transitions XTRActive Gray and Brown
**Transitions XTRActive Polarized Gray
**Transitions Style Colors, Emerald, Sapphire, Amethyst, Amber
**Style Mirror Lenses, Gold, Pink, Silver, Blue, and Green