Popular Science's website. "You can switch between magnified and normal vision by wearing modified 3-D television glasses. A button on the glasses changes their polarization. And polarized filters on the contact lenses determine whether the light passes through their magnifying part or their non-magnifying part. DARPA, a funder of our research, is interested in super vision. But the lenses may also work for people with macular degeneration, a disease that degrades the central part of the retina. Magnification makes it easier for those people to decipher small things, like text, with the healthy areas of their eyes." Read more.
BioOptics reports that "the lens' optics allow switching between normal and magnified vision
with the addition of modified, off-the-shelf 3D television glasses:
Without the glasses, the contact lenses superimpose both normal and
magnified images. With the glasses on, a liquid-crystal shutter will
switch open a window for normal or telescopic vision. The crystals
change the way light is refracted onto polarized films embedded in the
contact lens so that only light with a certain orientation, or
polarization, passes through the glasses to the contact lens, hitting
either the telescopic portion of the lens or the area designed for
normal vision. The engineers are working on a hands-free infrared LED
switch that will allow the wearer to activate one of the two functions
by either winking one eye or blinking with both eyes." Read more.