By letting the intensity of the sun shine into your eyes you stay connected to your circadian rhythms. That means when it gets dark out you start to feel tired and a few hours later you go to sleep. It means you wake up with the sun and if you go outside and watch the sunrise every day your mood will lift and you will become healthiier.
BODY LIFESTYLE 101 - Watch the sun rise.
(and do so without sunglasses!)

https://mychondria.com/…/why-you-should-throw-away-your-sun…