English: EYE-SYNC eye-tracking analyzer used as a device to detect potential cases of traumatic brain injury and concussion. On each eye there is an LED to illuminate light (located at the side next to the display lens) and a camera (located under the display lens) to continuously capture images of iris to calculate the vector between the stationary glint created by the LED illumination and the center of the iris to measure eye movements (see reference). This is part of the collections of the National Museum of Health and Medicine.