This product was formulated to help protect your eyes from blue light exposure day and night. Prolonged screen time with digital devices, which emit blue light, can strain and irritate eyes or even induce dryness, blurred vision, and sleep imbalance. Screen Time™ Blue Light Supportincludes zeaxanthin and lutein to help absorb high-energy blue light, maintain visual contrast sensitivity, and protect the macula. Vitamins and minerals have been added to our caffeine-free formula for optimal eye support.