What do glasses with a 'blue light filter' do and do you really need them?

The article on Slate discusses the impact of blue light on our health, particularly eye health. In recent years, the popularity of blue light-blocking glasses has surged, with many people opting to wear them to protect themselves from potential effects of excessive exposure to blue light. The author points out that while many individuals complain of eye strain and vision problems associated with prolonged screen time, scientific research does not definitively confirm the harmfulness of blue light. It is worth noting that eye fatigue may be more closely related to the long hours spent working without breaks, rather than the type of light being emitted. Additionally, blue light is present not only in screens but also in natural sunlight, making this topic even more complex. The author concludes by stating that despite the popularity of blue light-blocking glasses, there is little evidence supporting their effectiveness in alleviating symptoms of eye strain.