There is a lot of research showing that blue light after sunset can disrupt circadian rhythm and suppress melatonin production but recent studies are showing that this has even more serious consequences.With computers, TVs, tablets and phones, this use has extended even more and these new technologies are especially high in blue light. Shift workers and those who are regularly up late at night are at a higher risk for various cancers but more recent research shows that even recreational exposure to blue light for a few hours at night can have a negative effect.There is a simple way to reduce most of the blue light we see at night: orange sunglasses.