The device simulates electrical signals in the retina.
Scientists at the University of California at San Diego have created a prototype of lenses that can be controlled using eye movement: if the user blinks twice, the lenses will zoom.
Researchers measured electrooculographic signals that emanate from eye movement and created biomimic lenses that can capture these electronic pulses and change the focal length.
Electrodes are connected to the muscles around the eyes. Thus, voltage is applied to the electrodes on the lens, after which it changes the focal length. The lens created from biocompatible polymer can increase to 32%. In the experiment, the team used a dielectric elastomer to achieve the required deformation of the lens.
Lenses work regardless of whether the user can see. Even during sleep, many people move their eyeballs and produce electrooculographic signals, notes the project’s principal investigator. Scientists believe that the technology can be used in eye prostheses and glasses, and in the future to manage the lens remotely.