The cerjo Blue Blocker™ reading glasses are equipped with filter glass to absorb blue-violet light (UV 400) which is emitted from artificial sources of light: LED light bulb and screens (tablets, computers, smartphones,…). Those glasses protect the eyes from the short-wave light which is damaging to the retina. Absolutely trendy, comfortable and genuine, cerjo® readings are glasses for replacement or reserve, very useful if your quality of close vision is no longer so acute. These readers are to be treated as reserve glasses, to only be used for close range viewing and reading. They are not recommended to be used whilst driving nor as an eye protector. Only eye examinations by a professional allows optimal visual aid. The distance between the centers of the lenses of the cerjo® readers is between 58mm and 64mm. They are conform to the European Standard EN 14139.