Vision Express Blue Light

No. Vision Express says its blue-violet light filter glasses are typically non-prescription and non-magnifying, while the filter can also be added to prescription lenses. The exact option depends on the frame and lens order. [Vision Express blue-light glasses](https://www.visionexpress.com/glasses/blue-light-glasses?page=6)

Vision Express describes blue-violet light as the 400 to 455 nanometer range under ISO TR20772-2018. That describes the target range, not a promise that every lens blocks all blue light. [Vision Express blue-light glasses](https://www.visionexpress.com/glasses/blue-light-glasses?page=6)

No definite benefit has been established. A randomized trial involving 120 computer users found no significant difference in eye-strain symptoms between blue-blocking and clear lenses, so breaks, lighting, blinking, and a correct prescription still matter. [Randomized trial](https://pubmed.ncbi.nlm.nih.gov/33587901/)

They may reduce some blue-violet exposure, but they are not a guaranteed sleep treatment. Reducing evening screen use and using a device night mode are practical measures, especially because screen habits affect sleep more broadly than one lens filter. [American Academy of Ophthalmology review](https://eyewiki.aao.org/Computer_Vision_Syndrome_%28Digital_Eye_Strain%29)