What is the Origin of Targeted Light Exposure?

The concept is an advanced application of chronobiology and the Light Hygiene Principles, utilizing the knowledge of the non-visual effects of light on the brain. The 'targeted' nature emphasizes the precision required to shift or stabilize the circadian phase.

What is the Mechanism of Targeted Light Exposure?

The mechanism relies on delivering a high-intensity light signal, typically rich in the blue spectrum, to the intrinsically photosensitive retinal ganglion cells (ipRGCs) at a critical phase-response time. Exposure early in the morning advances the circadian clock, while exposure late in the day can delay it. This precise photonic input directly regulates the timing of the suprachiasmatic nucleus, ensuring downstream hormonal events are optimally timed for health.

Targeted Light Exposure ∞ Area

Targeted Light Exposure

Meaning

Targeted Light Exposure is the intentional application of specific wavelengths, intensities, and durations of light at precise times of the day to achieve a predetermined physiological or hormonal outcome. This is a chronotherapeutic intervention used to manipulate the circadian rhythm and modulate the production of key neurohormones like melatonin and cortisol. It moves beyond general light hygiene to a prescriptive, clinically-guided intervention.