According to the James Consulting, scientists have designed a smart contact lens (as shown below) that can measure the user's blood sugar without a needle. So far, this needle-free prototype has only been tested on rabbits, and it is unclear whether blood sugar can be accurately monitored with tears. But if it works, it will be a great boon for diabetics.
These glasses, like other contact lenses on the market, are made from the same transparent, flexible material. Inside, the researchers implanted electronics, including a tiny LED light and a glucose sensor. Researchers have reported in the recent issue of Science Progress that if blood sugar levels rise above a certain level, the continuously lit LED lights will flash off to alert the wearer.
Under the leadership of Jang-Ung Park of the Ulsan National Institute of Science and Technology in South Korea, scientists used artificial tears to add sugar to simulate low levels of blood sugar in tears found in earlier studies. They experimented on the rabbit: the LED stayed lit until the researchers injected the glucose solution into the rabbit's eye and the LED turned off as expected. However, so far this smart contact lens has not been tested in human eyes or with human tears.
This smart contact lens is the latest attempt to develop a needle-free blood glucose monitor for diabetic patients. John L. Smith, a former chief scientist in the Johnson & Johnson Blood Glucose Monitoring Division and author of The Pursuit of Noninvasive Blood Glucose, commented: "The implanted circuitry on flexible contact lenses is impressive." But he believes, tears The glucose content in the blood does not reflect the blood sugar level in the blood, so it can not accurately guide the treatment decision of diabetic patients. “This is not a reliable method of measuring blood sugar,†says Smith. “For the treatment of diabetes, blood glucose measurements must be very accurate and reliable, otherwise it will pose a health threat to the patient.â€
More than 30 million Americans suffer from some form of diabetes, a condition that causes excessive sugar or glucose in the blood. In order to prevent blood sugar from being too high or too low to exceed dangerous levels, diabetics must pay attention to diet and sometimes inject insulin. This is why accurate blood glucose measurements are critical. Smith said: "People with diabetes put their lives on this measurement."
At present, there are two main methods for measuring blood sugar, pricking a finger to collect blood, or inserting a needle under the skin to measure glucose in the blood between cells. Both of these methods can be painful, which is why many companies have been looking for needle-free blood glucose monitoring for decades. Many people have tried - including Google. But so far, this glucose-sensing smart contact lens seems to have not seen hope.
Smith said that the amount of glucose in the tears does not directly reflect the concentration of glucose in the blood. A paper from the 1980s supported this view: After testing 100 patients, the study found no significant correlation between blood glucose levels in blood and tears. "This is a very, very difficult problem," Smith said. Say. According to an e-mail statement, the research team is currently working with a hospital on clinical trials. However, before we further understand the application of this new type of contact lens in humans, the exploration and research on needle-free blood glucose monitoring will continue.
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