New device to sense eye movement runs on blinking, Pg12

Key Highlights:

• Scientists have created an eye sensor powered by blinking using a contact lens-like device.
• The device detects eye deflections of 2° and classifies movements with 99% accuracy in total darkness.
• Electrodes on glasses read the voltage induced by blinking to infer gaze direction.
• The technology may enable hands-free interfaces for individuals with motor disabilities.

Detailed Insights:

• The sensor utilizes a soft friction layer placed on the eyeball that generates electricity when the eyelid rubs against it during blinking.
• The induced voltage is then read by electrodes on glasses, allowing the device to determine the direction of the user's gaze.
• This innovation could provide a new method for controlling devices and interfaces for people with severe motor impairments.
• The high accuracy of the device, even in complete darkness, makes it suitable for various assistive technology applications.

Scientific/Technical Concepts Involved:

• Voltage: The difference in electric potential between two points, which drives electric current.
• Electrodes: Conductors through which electricity enters or leaves an object, body, or device.
• Friction: The resistance encountered when one surface or object moves relative to another.