Alertness sensing spectacles having an eyelid sensor to detect eyelid movement

摘要

A spectacle frame, for use in an eye monitoring system, is disclosed. The eye monitoring system includes a pair of ocular frames connected by a nose bridge and frame arms that extend from the outer edge of each ocular frame to fit over the ear of the wearer where an eyelid sensor unit is adjustably attached to the nose bridge. The eyelid sensor detects both eye and eyelid movement and includes a signal emitter and a signal detector recessed into the surface of the unit to reduce the proportion of signal reflected by the eye or eyelids, received by the detector, which is not from the signal emitter.