She also worked with Andrew Field Huxley in 1963 and Bernard Katz in 1970.[1] Falk and Fatt later researched celluar biophysics to increase awareness of phototransduction of the retina.[2] In 1974, Falk and physicist Jonathan Ashmore worked on a post-doctorate to demonstrate that light responses can be increased significantly at the synthase between the rod bipolar cell and photoreceptor cell.[2][4] Throughout the 1990s, she and Richard Shiells pioneered the use of micro-electrodes to analyse a solitary bipolar cell.[2]