Those interested in the Google Glass need to know that, according to the researchers disposable contact lenses individualized according to user and display needs could be an alternative to improving everyday quality of life. Researchers from several institutions, including two of the researchers at Samsung have already created disposable contact lenses of this type, using nanomaterials to solve some of the problems that make contacts less than 100% practical.
A group led by Jang-Ung Park, engineer in chemistry of the Institute of Science and Technology, a light emitting diode mounted on soft contact lens using a material developed by researchers: a transparent material, conductor, created dintr- a mix of silver nanowires and graphene. First of all, the researchers tested the lenses on rabbits – you like the human eye – and have not found any negative side effects even after five hours. Dogs not suffered any allergy and the electronic lens worked perfectly. This experiment was actually described in the journal Nano Letters online.
A Conductive Material with Special Properties
To complete the project successfully they initially had to find an electrically conductive material that is both flexible and resistant. An especially transparent conductor was found in conventional electronics rigid indium oxide and tin form crumbly, so it had to be stored at very high temperatures to melt lenses. Organic conductors, electrical grafts and nanowires are flexible and transparent, but not conductive enough.
Working with -Woo Nam Sung at the University of Illinois, Park found that by compressing silver nanowires between graphene layers, results in a composition with a lower electrical resistance than they have separate materials. The industry standard for a transparent conductor is a resistance of 50 ohms per square or less, says Nam; they created material has a resistance of about 33 ohms per square. The material also transmits 94% of visible light and has the ability to stretch. The researchers made these sheets by depositing conductive liquid solutions of nanomaterials on a spinning surface, at very low temperatures. This is available for all disposable contact lenses.
Samsung Involved in This Business Too
Working with researchers from Samsung, a contact lens covered with the conductive elastic, then placing a diode emitting layer respectively. While it would be an exaggeration be called a display, because it is only one pixel, it is likely that this type of material will be an essential component in future displays forcontact lenses, says Herbert De Smet, who works electrical contact lenses from the University of Ghent in Belgium.
In fact, several companies and researchers have developed electronic contact lenses in the past five years, so it is better to know more about this problem. Several tests need to be run until the lenses are made available to the public
Sensimed, Switzerland, has focused on achieving a contact lens that worked 24 hours for monitoring intraocular pressure in glaucoma patients. On the other hand, other researchers including Professor of the University of Washington and co-founder BabakParviz project Google Glass, created to display different types of contact lenses. But these devices have used rigid material or color.
Park wants ultimately to make contact lenses that include all the features of a laptop and while remaining transparent and soft. “Our goal is to achieve contact lenses with display that can provide all the properties that Google Glass offers“, he says.
Nam believes that electronic contact lens applications could be more promising than other displays. Currently, he uses wires and graphene nanowires to create biosensors that can monitor health conditions, by sampling the tear layer of the eye. Group De Smet develops contact lenses that filter out light actively compensate for vision problems.
Therefore, researchers have all interest to offer us a better and easier life by improving eyesight through innovative products. There is one question remaining, at least for now: Will these concepts representing both Google and Samsung disposable contact lenses be made available to the general public or not?