(a) The mimicry of interest-modulated human visual memory with (i) low interest represented by V_m = −0.15 V, (ii) intermediate interest represented by V_m = 0 V, and (iii) high interest represented by V_m = 0.15 V.^[14] Copyright (2019) American Chemical Society. (b) Schematic diagrams of a butterfly being observed through human visual system and (c) schematic diagram of the artificial visual memory devices for detecting and storing image.^[15] Copyright (2018) John Wiley & Sons, Inc. (d) Working mechanism of the human eye and threshold-intensity-dependent photo-response of the photodetector. (e) Experimentally measured photocurrent of the device before and after the UV illumination, showing the appearance of allodynia and hyperalgesia characteristics.^[31] Copyright (2019) John Wiley & Sons, Inc.