Types of sunglasses with UV protection

Types of sunglasses lenses include UV glass lenses, plastic lenses, photochromic glass lenses, polarized lenses, PL photochromic lenses, and polycarbonate lenses.
Among these, UV glass lenses, plastic lenses, and photochromic glass lenses have UV-blocking properties that block almost all UV-B rays.
In addition, polarized lenses and PL photochromic lenses have UV protection properties that block UV-A rays.
The polycarbonate lenses also offer UV protection up to 380nm.
Some lenses are also treated with UV400, which reduces UV transmittance to less than 1%.
These days, there are many sunglasses on the market that are UV400 protected, and I highly recommend them.

Not all sunglasses with high UV protection are dark in color.
Did you know that recently there has been an increase in sunglasses that use a type of lens called a shield?
With UV400 processing, the UV protection processing is applied after the finished lens is finished, which usually results in a slight yellowing.
On the other hand, in the case of sunglasses lenses called shields, ultraviolet absorbers are already mixed into the lenses, giving the sunglasses UV protection.
Shields eliminate yellowing and increase transparency, making it easier to create sunglasses in pale colors, so many of the products are stylish.