FIELD: medicine.
SUBSTANCE: personal alarm system comprises means adapted to be worn close to the eye of the subject. The eye includes an eyelid, eyelid detector configured to determine the state (open or closed) of the subject's eyelid, a radiation source installed on the device and adapted to emit radiation in the first wavelength range into the subject's eye in the visible spectral region above approx. 590 nm, and a controller. The first wavelength range is chosen so as to allow the subject to perceive the radiation as a specific colour light that after passing through his/her eyelid, and the radiation source is adapted to stop the radiation, if the subject's eyelid is open. Subject awakening is carried out by the personal alarm system or a system adapted to wake the subject by radiation emission in the closed eyelid, comprising means for radiation source carrying near the subject's eye, means for subject's eyelid state determination (closed or open), means for radiation emmission in response to eyelid closed state determination.
EFFECT: application of inventions expands the range to wake alarm devices.
18 cl, 8 dwg
