Light therapy can be used for circadian rhythm sleep disorders, such as sleep onset insomnia. That’s when you have trouble falling asleep at a normal time, but no problem staying asleep.

Blue light from electronics is linked to problems like blurry vision, eyestrain, dry eye, macular degeneration, and cataracts. Some people have sleep issues. Here’s what you need to know.

Red light therapy can be an anti-inflammatory and can have calming effects on the skin, according to board-certified dermatologist Lauren Fine, MD, medical director of Fine Dermatology in Chicago ...