Do you know photochromic lenses?

Photochromic Lenses are lenses that can automatically adjust the color depth according to the intensity of ultraviolet rays. They darken in the sun and return to transparency when entering the room.

1. Working Principle

Photosensitive substances: The lens contains silver halide or organic photochromic molecules, which react chemically under ultraviolet (UV) light, causing the lens to darken.

Reversible reaction: When the ultraviolet light weakens (such as entering the room), the lens gradually returns to transparency, and the process usually takes a few minutes to half an hour.

The film color change technology changes color faster than the substrate color change technology.

2. Main features

UV protection: 100% blocking of UVA/UVB, protecting the eyes from UV damage.

Automatic adjustment: No need to manually change the lens to adapt to different light environments.

Convenience: Suitable for outdoor activities (driving, skiing, cycling, etc.) and daily use.

3. Common types

Glass lenses: fast color change, but heavy and fragile.

Resin lenses: light and impact-resistant, but slightly slower color change.

TAC lenses (polarized photochromic): combined with polarization function, reduce glare, suitable for driving.

4. Advantages and disadvantages

Advantages:

One lens for multiple uses, saving the trouble of carrying multiple pairs of glasses.

Protect eyes from UV damage.

Disadvantages:

The color change speed may be slower in low temperature environment.

After long-term use (about 2-3 years), the color change ability may weaken.

The color change effect in the car is limited (the car windshield will block some ultraviolet rays).

5. Applicable scenarios

Outdoor activities: such as cycling, mountaineering, skiing, etc.

Driving: Choose photochromic lenses designed for in-car,like Transitions lenses

Photosensitive people: those who are sensitive to strong light or recovering from surgery.

How to choose?

When choosing photochromic glasses, you should consider the functional characteristics of the lenses, the purpose of the glasses, and your personal color requirements. Photochromic lenses can also be made to change to a variety of colors, such as gray, brown, blue, purple, orange, pink, green, etc.

With the needs of modern life, the role of colored glasses is no longer just to protect the eyes, it is also a work of art. A pair of suitable colored glasses, matched with the right clothes, can bring out a person's extraordinary temperament.