Smart Contact Lens

imec, a research and innovation hub for nanoelectronics and digital technologies, has announced a hydrogel-based smart contact lens that incorporates a silicon microchip, integrated LED light, and radiofrequency (RF) antenna for wireless energy transfer. Belgium-based imec claims that the new lens paves the way for integrated sensors or drug delivery capabilities, whereby a contact lens could continuously monitor for signs of ocular diseases, and even administer treatments.

Ghent University and SEED Co., a contact lens manufacturer based in Japan, collaborated with imec to develop the device. Designing flexible electronic components and seamlessly integrating them into a soft hydrogel lens were major challenges in creating the new device.

The lens needed to be oxygen-permeable, wrinkle-free, thin, and comfortable to wear, while maintaining electrical functionality. The researchers conducted significant optimization to achieve these properties.

The lens incorporates a blue LED light that is powered by a radiofrequency antenna. The antenna should also allow for any integrated sensors to transmit data to a handheld device for analysis. At present, the device represents a proof-of-concept, and imec hopes to expand its capabilities in the future.

Medgadget asked Prof. Herbert De Smet of Ghent University and imec, some questions about the system.

Conn Hastings, Medgadget: Please give us some background on this type of technology and the current state of the art.

Herbert De Smet: Globally, quite some effort has been spent on realizing so-called ‘smart contact lenses’ — contact lenses that contain electronics to increase the functionality of the lens in many possible ways. Most efforts have focused on hard lenses made of rigid gas permeable material or on soft lenses made of silicone, both of which are materials that are still relatively compatible with standard electronics integration technologies. However, we are one of the only groups in the world that has demonstrated the capability of integrating functional electronics in hydrogel-based soft contact lenses.

Medgadget: What types of ocular diseases could a smart contact lens be useful for monitoring and treating?

Herbert De Smet: Smart contact lenses could offer adaptive optical correction for presbyopia patients. They can also offer a solution for people with iris deficiencies, such as aniridia or coloboma. As reported in our research, we have prepared the technological platform to integrate sensors that continuously or regularly monitor bodily parameters such as the concentration of certain substances in the tear fluid. The sensors can be powered and also read out wirelessly. Our partner, SEED, is presently assessing which parameter would be the most important for a first use case.

Smart Contact Lenses are Here: Interview with Prof. Herbert De Smet of Imec [Medgadget]

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