[link needed lens assist] What are the most problematic light sources?

Artificial lights and digital screens have high concentrations of uncomfortable blue light that can cause a pain response.

Cool white LEDs are the worst contenders, emitting the highest amount of blue light of all artificial light sources. Fluorescents have similarly high levels of blue light and come with a pesky invisible flicker. Worst of all, LEDs and fluorescents are the backlight of most digital screens – from phones, to TVs, to computers!

To provide protection and relief, we designed indoor TheraSpecs to block approximately 80% of the most problematic blue light wavelengths (480-520nm).

If sunlight is just as uncomfortable, then we recommend trying a polarized outdoor pair of TheraSpecs, filtering more than 92% of the same wavelengths and cutting back on painful glare.