Each year, approximately 140,000 patients are affected by deficit of the seventh cranial nerve, which provides signals for the facial expression muscles for one side of the face. Of these patients, about half are unlikely to recover, and many sustain permanent damage to the eye. Current treatments for this disorder include sewing the eyelids together, connecting other nerves to the facial nerve, and implanting gold weights into the upper eyelid. Unfortunately, these treatments can disfigure patients and do not restore dynamic restoration of blinking.
This E-Team is developing a prosthetic device to facilitate blinking in patients suffering from facial nerve palsy. The device will consist of a number of tiny silicon chips that act as both actuators and sensors. The devices will be implanted in upper eyelids, and function as sensors on the unaffected side to pace the actuators on the affected side. The dual sensing/actuating nature of the system will allow the device to sense any recovery of the nerve on the affected side and calibrate itself accordingly. Power is provided to the chips by a device contained on prosthetic eyeglasses with a powering antenna wound in the lens holders, and a battery in the earpieces.