US Patent 10272259 Hair growth using phototherapy treatment

An apparatus to promote regrowth of eyebrow hair comprises a frame, and a set of temples to enable the apparatus to be worn on the forehead of a user. The apparatus includes a central member with a nosepiece, the central member being attached to one or more light hubs. Each light hub includes a plurality of light sources, and the light sources are configured to emit light onto a portion of a user's head. A head piece component attached to the central member top extends over the user's head. Light emitted by the light sources has a wavelength ranging from about 600 nanometers to about 1200 nanometers. The apparatus includes an adjustment mechanism that enables the interpupillary distance between the light hubs to be adjusted, and padding proximate the light hubs to provide a close fit between the light hubs and the user.