An overabundance of blue light from ever-present computers and cell phones can cause daytime fatigue and upset our natural rhythms.
blue light is close on the spectrum to ultraviolet light, which is responsible for sunburns. Blue light can cause cumulative damage over a long period of time, as it passes through the cornea and lens and reaches the retina.
Damage to the retina can cause vision problems such as age-related macular degeneration, which can lead to permanent vision loss.