The specific wavelength green light is transmitted to the inner retina, and the Suprachiasmatic nucleus, which controls the body’s internal secretion on the hypothalamus, adjusts the secretion levels of melatonin under different situations.

Under normal conditions, the body will secrete a high level of melatonin at night to help you fall asleep, and the secretion level goes down as the sun rises. The amount of this light your body receives helps determine how your body adjusts to mood and energy.

When the Suprachiasmatic nucleus receives the light signal from PEGASI, an order is sent to the brain to stop the secretion of melatonin. This inhibition will last a few hours to help people not return to a sleepy stage. The best time to use the smart glasses are when waking up from 7 am to 9 am. After daytime, melatonin is released drastically to help users fall asleep at night.