Here are explanations on the purposes of measures against ultraviolet rays divided into two main groups.
１. Measures against ultraviolet rays to slow down the progression of eye disorders even if only a little
I was told by my ophthalmologist that lenses that cut out harmful ultraviolet rays and highly irritating blue lights would be good for me. Are there any such lenses that are available? The lenses that your ophthalmologist recommends are absorption lenses. These absorption lenses are friendly to the eyes as they effectively suppress blue light rays, which have some of the more powerful short wave lengths (380 to 500 nm) among visible rays and a scattering feature, while completely cutting out ultraviolet rays.
2. Measures against ultraviolet rays for maintaining health and protection from such harmful rays
I have heard that problems such as cataract and blemishing are caused by ultraviolet rays. I have heard that some sunglasses are unable to cut out ultraviolet rays. What kind of lenses do I need?
There are three points to keep in mind regarding ultraviolet rays.
１．lenses with ultraviolet protection should be selected regardless of whether they are colored or clear.
２．Absorption lenses that suppress not only ultraviolet rays but light of short wave lengths (blue light rays), which is a particularly powerful form of visible rays, are friendly to the eyes and recommended for preventing eye disorders.
３．Even if they are of darker colors, absorption lenses reduce glaring without making the environment look darker like sunglasses do. Absorption overglasses are simple and convenient as they can be worn over your eyeglasses.