Do you know how to judge the pros and cons of photochromic lenses? Today, the quality 1.56 SF Mirror Photochromic Brown lens editor will take you to a brief understanding.
1. The speed of discoloration: When a good color-changing lens encounters ultraviolet rays outdoors, the discoloration speed is relatively fast, and the color fades quickly indoors.

2. The depth of the color changing color: the stronger the ultraviolet rays of a good color changing lens, the deeper the color changing, and the general color changing lens may be relatively poor in color changing.
3. A pair of color-changing lenses, the degree of which is basically the same or a film-changing lens, the speed and depth of color change of the two lenses are basically the same, and there should not be a situation where one is dark and the other is light.
The above is the quality 1.56 SF Mirror Photochromic Brown lens editor's description: the method of judging the pros and cons of photochromic lenses.