Study Indicates Aging Eyes Leads to Sleep Disorders

"A natural yellowing of the eye lens that absorbs blue light has been linked to sleep disorders, and as the discolouration gets worse with age, so do the sleepless nights, a new study has found," according to a SudburyStar post. "In the Danish study, 970 volunteers had their eyes examined by lens autofluorometry, a non-invasive method for determining how much blue light is transmitted into the retina. Blue light is a portion of the visible-light spectrum that influences the normal sleep cycle by helping initiate the release of melatonin in the brain. Melatonin is a hormone that helps signal to the body when it's time to be sleepy or alert." Read more.