Tohoku University demonstrates contact lenses that are moistened with electricity–no need for external power source with bio batteries

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Tohoku University's research team experimented with measures to circulate tears with the power of electricity to prevent dry eyes when wearing contact lenses.Confirm moisturizing effectdid.

Contact lenses moistened with electricity [Source: Tohoku University]

Contact lenses moistened with electricity [Source: Tohoku University]

Although it is a contact lens used for vision correction, it is often used for fashion purposes like a color contact lens [color contact lens]. It also has various functionsSmart contact lensThe development of is also attempted.

However, when a contact lens is attached, an oil film layer is lost from the surface of the eye, and moisture easily evaporates. As a result, the eyes are dry and the risk of damaging the eyeball is also increased.

Eyes dry when wearing contact lenses [Source: Tohoku University]

Eyes dry when wearing contact lenses [Source: Tohoku University]

In order to solve this problem, the research team focused on a physical phenomenon called electroosmotic flow. Electrodes were provided at the top and bottom of the contact lens, and a voltage was applied between them to allow tears to flow from bottom to top. As a result, it was confirmed that water flow was generated in the lens and the drying speed was reduced.

Furthermore, the possibility that a bio-compatible biobattery can be used as a power supply means was also shown. This method eliminates the need for external power supply, and realizes an anti-dry eye lens with a self-moisturizing function composed only of organic substances.



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