The more we stare at screens, the more our eyes will be tired and strained. With the Xtreme Blue Light Filter Glasses, you can protect them from the stain of your most used devices. The polycarbonate lens can reduce the glare from the amount of light put out by up to 90%. All of which prevents strains, eye soreness and potential headaches. To test your glasses, place them in front of the included Blue Test Card and use the Blue light against the lens and any uncovered space. This can determine the strength of the lens in the glasses themselves. Keep your eyes from exhaustion with the Blue Light Filter Glasses from Xtreme.