So I heard the words "current dipole" mentioned in a presentation about modeling the retina and using the ERG (electroretinogram). I understand what an electric dipole means (usually speaking of two point charges with opposite charges). But what exactly is meant by current dipole? All I know is that it is where you have charges flowing in opposite directions at a certain point (?) . I can clearly tell that I don't understand this right. I've been searching the web for an answer for a while, but I haven't found anything helpful. I would appreciate it if you point me to an answer (a link to an article that explains it) or give one here. Thank you for your time.