In the journal Nature, Dr. Charles Czeisler discusses the function of intrinsically photosensitive retinal ganglion cells (ipRGCs) in regard to regulating circadian rhythm. Just as the ear has two functions (hearing and balance), so does the eyes. Light exposure at night, particularly in the wavelengths 459 nm to 484 nm,  has decoupled us from the 24-hour-day from which our […]

Read More… from Are the longer wavelengths blue light from your tablets, phones and computers keeping you up at night? Probably …