Interscatter communication would allow devices such as contact lenses to send data to other devices, according to the researchers. Until now, such communication had not been possible, because sending data using Wi-Fi requires too much power for a device like a contact lens.
To demonstrate interscatter communication, the engineers designed a contact lens equipped with a tiny antenna. The Bluetooth signal, in this case, came from a smartwatch. The antenna on the contact lens was able to manipulate that Bluetooth signal, encode data from the contact lens and convert it into a Wi-Fi signal that could be read by another device.
And though the concept of "smart" contact lenses may seem a bit gimmicky, they could, in fact, provide valuable medical information to patients.
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For example, it is possible to monitor blood sugar levels from a person's tears. Therefore, a connected contact lens could track blood sugar levels and send notifications to a person's phone if levels went down, study co-author Vikram Iyer, a doctoral student in electrical engineering, also at the University of Washington, said in a statement. (Monitoring blood sugar levels is important for people with diabetes.)
The researchers also said interscatter communication could be used to transmit data from brain implants that could one day help people with paralysis regain movement.
Not all of the potential applications are related to medical devices, however. Interscatter communication could also exchange information between credit cards, the researchers wrote. This would allow people to transfer money between cards by simply holding them near a smartphone, for example, they said.
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