There are several ways to tell if your glasses are blue light:
1.Brand: Some glasses are specifically designed to block blue light, so if you have a pair of glasses that was specifically prescribed for blue light reduction, it is likely that they are blue light glasses.
2.Appearance: Blue light glasses may have a slightly tinted or brownish color to them, and may also have a noticeable blue or purple tint to the lenses.
3.Lenses: Blue light glasses may have a special filter that blocks out blue light, or they may be made of a special type of glass that blocks blue light.
4.Certification: Some glasses may be certified as blue light blocking by organizations such as the Blue Light Filter Project or the American National Standards Institute (ANSI).
5.Packaging: Blue light glasses may be packaged differently than non-blue light glasses, with different instructions for use and warnings.