A team of researchers from Sao Paulo has created, together with American scientists, glasses capable of measuring the level of glucose in the blood through a biosensor. They do it through tears, a much less invasive formula than the one diabetics are forced to use.
Worldwide, there are an estimated 380 million people with diabetes. The World Health Organization has raised the alarm against this disease, in fear of its spread. The organism believes that around 2035 there may be 580 million diabetics in the world.
The glasses created by these scientists, from the University of Sao Paulo and the University of California, are based on the use of the enzyme glucose oxidase to react with tears. The device has a biosensor capable of measuring chemical reactions and generating a signal proportional to the concentration of a certain substance.
The user produces tears by exposing their eyes to an eye-sensitive substance that stimulates a lacrimal gland. These come into contact with glucose oxidase, immobilized on an electrode, in turn, connected to a circuit. The contact alternates the flow of electrons producing a signal that is recorded and processed in the glasses and then send the result to a smartphone and computer.
Biomedical Glasses and Contact Lenses
These diabetes monitoring glasses are an example of how the accessories we use to improve our vision can be used for something more. Lenses with biomedical capabilities have also been created through a biosensor, which would allow the detection of some diseases. Glucose monitoring was even postulated as one of the possible applications.
And it is that contact lenses are one of the devices whose intelligence has been deeply studied. As advantages are its ability to integrate with the human body. But its drawbacks come from precisely the same side. Its structure, so small and so integrated, does not allow the electrical supply easily.
Glasses, on the other hand, are devices that work more easily. It is possible to attach a battery and even hide it, while the space to integrate the capabilities of the biosensor is also greater.