Night vision is the ability to see in low light conditions. Whether by biological or technological means, night vision is made possible by a combination of two approaches: sufficient spectral range, and sufficient intensity range. Humans have poor night vision compared to many animals, in part because the human eye lacks a tapetum lucidum.
近义、反义、联想词
近义词
n.
sight, vision, visual sense, visual modality
英英词典
night vision n.
the ability to see in reduced illumination (as in moonlight)