Scientists invent micrometers-thin battery charged by saline solution that could power smart contact lenses::Scientists from NTU Singapore have developed a flexible battery as thin as a human cornea, which stores electricity when it is immersed in saline solution, and which could one day power smart contact lenses.
While pouring salt into your eyes to power it!
Saline is isotonic and, short of a large electrolyte imbalance, shouldn’t cause any/very little irritation to your eyes
Saline is what you are supposed to wash your eyes out with when you get something in them in addition to being what contacts are stored in every night