It is a popular depiction of the futuristic world to show contact lenses that can display smartphone information: text messages, emails, phone calls… Don’t get too excited, this isn’t today’s news exactly. What has actually been created is a set of contact lenses that allow the user to zoom in and out of everyday life.
The gadget is basically a slightly larger contact lens that covers both your retina and the whites of the eye. It is also thicker and much more rigid than normal contacts, but can still be worn comfortably. In addition, it is covered with strips of aluminium mirror forming a circle, which cause light to be reflected many times within the lens, creating a magnification of 2.8 times. For the apparatus to work at its finest, it has to be joined to a pair of electronic glasses. When the subject winks with one eye, it activates the glasses, so they switch from normal mode to polarised mode. Then, they filter light so only light of one wavelength passes through (polarises) and focuses it on the telescopic area of the lens, which gives a zoomed in view. By winking with the other eye, the glass switches back to normal mode so there is no zoom.
At the moment, there have been no human trials due to the risk of harming the eye. The lenses are naturally thick, so it is difficult for air to pass through and keep the surface of the eye fresh and oxygenated. The newest model of this contact includes many little pores that allow air to pass, so the lenses can be worn for a longer period of time with a much lower risk.
Designing these lenses was not only for entertainment or a cool technological device, but rather for medical purposes. These zooming contact lenses can help people with limited visibility, like those with macular degeneration, a disease which affects muscles in the retina. They offer a much easier and practical alternative than surgery or special, expensive glasses.