Overexposure to blue light is harmful to sleep, eyes and skin. Blue light disrupts sleep by suppressing melatonin and changing the body\'s circadian rhythm. Blue light also causes eye fatigue and may lead to long-term eye damage. Blue light prematurely ages the skin, similar to the sun’s harmful UVA rays.Overexposure to blue light is harmful to sleep, eyes and skin. Blue light disrupts sleep by suppressing melatonin and changing the body\'s circadian rhythm. Blue light also causes eye fatigue and may lead to long-term eye damage. Blue light prematurely ages the skin, similar to the sun’s harmful UVA rays.