Light in the ear has no effect

We have published the first independent study about the Valkee device and showed that light in the ear does not acutely affect human circadian physiology, alertness and psychomotor vigilance performance. The efficacy of the Valkee device is controversial and independent studies are needed.

Ny Teknik: Light in the ear is questioned by researchers (Swedish)

Ny Teknik: Researchers encourage more studies with light in the ear (Swedish with English comments of Vivien Bromundt)

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