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]
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]
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.