“…8. Working of bionic eye (Banerjee et al, 2020) Fourthly, because the distance between the electrode and the neuron is a significant factor in determining the current threshold, which is essential for cell activation and has a critical impact on the nature of the obtained signal (McCreery, Yuen, Agnew, & Bullara, 1997). Advisible material for electrode will be one that will amplify the signal in the extracellular fluid by making electrode−tissue contact more intimate.…”