EOG

Isolating the Corneo-Retinal Dipole: Building a Robust EOG Analog Front-End

The human eye is a natural dipole. The cornea carries a positive charge while the retina is negatively charged, creating a resting potential of roughly 10 to 30 millivolts. The raw voltage potential reaching the skin is attenuated to the microvolt range and completely drowned out by surrounding electromagnetic interference (EMI) and electromyographic (EMG) muscle noise.