The term "dusk visual system" refers to the ability of our eyes to adjust to dim light conditions. There are several other synonyms that can be used to refer to this phenomenon. One such term is "scotopic vision," which describes our ability to see in low-light conditions using the rod cells in our retina. Other related terms include "mesopic vision," which refers to the intermediate lighting conditions between scotopic and photopic vision, and "twilight vision," which describes our ability to see in the period of low light between sunset and complete darkness. All of these terms describe how our eyes adjust to different lighting conditions and allow us to see even in challenging environments.