The researchers utilized special electric signals generated by eye movements to control and change the focal length of the soft lens.
Researchers have developed a soft contact lens which can zoom in when you blink twice, enabling it to switch focus between objects at different distances.
The device is made from layers of flexible polymers which expand when an electric current is applied,reported. Conversely, when the current is removed, the lens contracts. These deformations alter the light that travels through the lens, adjusting the vision of the wearer. The scientists programmed the system so that when the user blinked twice, the lens would zoom in. If they did the same again, the lens would zoom back out.
"Second, in the current device, we did not realize the control of continuous motion of the lens," they wrote."Third, as shown in the demonstration, the correction of the unexpected motions of the lens was not automatic, and the interference of human was required."
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