Contact lenses for viewing images
New research incorporates a single pixel into contact lenses, paving the way for displays such as robots that are often equipped with high-tech screens, allowing a human to read text and views of the world around them.The birth of digital contact lenses: from the laboratory to the market it is possible by replacing the eyeball with a digital image sensor connected directly to the optic nerve. A lot of work has been done in this area, in hopes of giving the blind bionic vision, but the eyeball replacement block, and surgery, is not for most of mankind. A more popular solution is to develop a contact lens capable of similar feats.
Like the electronic revolution in the 1970s and 1980s, in 2001 Matteo Leonardi and Daniel Bertrand used a micro-electro-mechanical sensor (MEMS) to create a contact lens that monitored eye pressure – an important indicator of glaucoma. In 2003, Mr. Leonardi co-founded a Swiss Federal Institute of Technology (EPFL) spin-off to commercialize the project. In 2009, the company launched the first digitally active commercial contact lens. The finished design, dubbed the “crossbow”, uses a built-in sensor and microprocessor inside a soft silicone contact lens. All of these circuit elements are out of line of sight. The device receives power signals through a circular antenna around the eye socket.
But creating a contact lens display was his main goal. The main obstacle was focusing the image. In his latest work Professor Parviz has enlisted the help of Finnish researchers from Aalto University to create an optimized contact lens that incorporates micro-Fresnel and focuses the micro LED light onto the retina. The design has been tested and proven safe and does not cause damage.