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With LED design, smart contact lenses can detect blood glucose


Google has announced that it will create a smart contact lens to monitor the user's blood sugar, but there is no clear result. After joining Google, the team of South Korea's Ulsan National Institute of Science and Technology, under the leadership of Prof. Park Jang-Ung, successfully designed a similar product that can test blood glucose of the user without the need for a needle. The interior of the contact lens incorporates an LED design that normally remains on. Once the person wearing the contact lens has exceeded the blood glucose level, it will automatically shut down.

These smart contact lenses contain mixed substrates, transparent conductors, and many functional devices, including LEDs in functional devices. When using smart contact lenses, electricity is transmitted through the included small antenna, activating LED pixels and glucose sensors in the lens. Once the blood glucose value of the tears is detected, the resistance of the sensor will be reduced, resulting in increased resistance of the LED series circuit. The LED light source will automatically turn off to alert the user.

The research team mentioned in the report that the miniaturization of blood glucose detection allows users to detect blood glucose without using large-scale detection equipment. At the same time, the report also pointed out that smart contact lens templates can be manufactured quickly, and the use of traditional processing methods is conducive to mass production in the future. Although this product has been used in rabbit experiments, the research team also stated that it has no side effects, but at present it has not passed human experiments. Scientists hold the question of whether the glucose oxidase in the sensor will damage the eyes and how to extend the service life. With doubts, it is impossible to ensure that blood sugar levels can be accurately measured through tears.

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