A team at the University of Utah has created "smart glasses" with liquid-based lenses that can automatically adjust the focus to what a person is seeing, whether it is far away or close up, phys.org reports.
Led by electrical and computer engineering professor Carlos Mastrangelo and doctoral student Nazmul Hasan, the team has created eyeglass lenses made of glycerin, enclosed by flexible rubber-like membranes in the front and back.
"Most people who get reading glasses have to put them on and take them off all the time," Mastrangelo said. "You don't have to do that any more. You put these on, and it's always clear."
The lenses are housed in special frames. There's a meter in the bridge of the glasses that measures the distance to an object with pulses of infrared light. When the wearer looks at an object, the meter instantly measures the distance and tells the actuators how to curve the lenses.