How does the human non-image-forming visual system represent, encode and process light and color? Dr. Spitschan is interested in how light affects our brain, physiology and behaviour beyond what we consciously see and perceive. Dr. Spitschan is specifically interested in the short-wavelength (blue) sensitive photopigment melanopsin, which aids in synchronising our bodies and brains to the prevailing light-dark cycle, and in controlling the size of the pupil.