Abstract: A method is provided for controlling a device configured for treating a disorder of a subject. The method comprises providing power to an implantable device configured to be located within a submucosa of a nasal cavity of the subject to cause the implantable device to emit near-infrared light and red light directed to at least one of regions of an ocular structure, regions of a cerebrum, cerebral nerves, and cerebrospinal fluid, regions of a vascular system, and regions of a lymphatic system of the subject. The device is configured to be implanted in a position to deliver the near-infrared light and the red light to the at least one of the regions of the ocular structure, the regions of the cerebrum, cerebral nerves, and cerebrospinal fluid, regions of the vascular system, and the regions of the lymphatic system in a dosimetry and duration sufficient to treat the disorder.