During his doctoral studies, he researched the visual perception of motion, using psychophysical techniques. Chaudhuri went on to a postdoctoral position at the Salk Institute in San Diego. He then worked as a research associate at University of British Columbia, where he acquired training in molecular biology. Chaudhuri's main research is to develop a diagnostic tool for early assessment of the colour blindness associated with glaucoma and diabetic retinopathy. Colour blindness, particularly to blue light, is often one of the first symptoms of these conditions.
Colour vision is mediated by retinal cells known as cones.
Colour blindness is caused by the dysfunction of the cones responsible for detecting a particular colour. We've developed a technique which allows us to assess in colour-anomalous individuals the relative state of perceiving reds versus greens, or blues versus yellows, or any other pairs of colours. Chaudhuri is refining for clinical use an experimental technique he previously developed to determine when a subject perceives two simultaneous colours to be equally bright. Many psychology experiments into assessing colour vision rely on a subject's perception of this equal brightness, or equiluminance. Chaudhuri's technique consists of a computer-generated visual stimulus.