CIRCADIAN PERFORMANCE LAB
Question 4 of 5 (80%)
Circadian Cognitive Peak & Ultradian Sync Test — Select the option that most accurately reflects your natural response.
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Scenario #4
How much bright screen light are you exposed to in the 60 minutes before sleep?
💡 Context: Evaluates Melanopsin Retinal Ganglion Cell suppression of nocturnal melatonin.
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Why This Metric Matters (Photic Phase Delay Risk)
Short-wavelength blue light (460–480 nm) between 10 PM and 2 AM suppresses pineal melatonin secretion by over 50% and blunts next-day dopamine receptor sensitivity.