H1 What is blue light?
- Blue light enters the human body through the eyes and skin as we have melanopsin everywhere in the human body. Melanopsin is a blue light detector.
- Blue light enters your eye through the retina then to the supercoasmatic nucleus, which is an atomic clock that controls all the clocks in your body. This is how our body’s master clock know what time of day it is.
- Blue light enters your skin through melanopsin, this our the clocks in our skin get the input signal for what time of day it is.
H3 Blue light

H2 How blue light interacts with the body
- Blue light enters your eye through the retina then to the supercoasmatic nucleus. Therefore exposing your retina to this light signals to your brain constantly that is midday.
- Midday is the time of day that we are evolutionarily meant to be most awake and aware. This is the time of day that our autonomic nervous system is also most engaged.
- Thus if you expose yourself to blue light, especially in the evenings it will disrupt your body’s ability to sleep because you will be more awake and your clocks will be tricked to think it’s midday.


