Scientists from Nanjing, China, have developed eye-tracking smart content lenses based on radio frequency tags that can be used for various applications, including health care and augmented reality (AR). The lenses are biocompatible and imperceptible, requiring no battery or conventional silicon chips.

Smart contact lenses that can keep track of various health factors and can be used for human-machine interaction (HMI) are a relatively new technology. These rely on tracking using methods like pupil center corneal reflection and electrooculography (EOG).

While these methods have shown some success, they lack accuracy and are susceptible to interference. Additionally, EOG, which uses skin electrodes for collecting data, has been shown to pose a risk to the skin.

The new study published in Nature Communications aims to overcome the challenges posed by traditional methods.

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