Research overview: comparing cat and human performance in dim light

How much better do cats really see in the dark than people? This overview surveys behavioral and physiological comparisons, which generally credit cats with the ability to detect light at intensities several times below the human threshold, alongside markedly poorer acuity and color vision. The cat's advantages come from a larger relative pupil, denser rods, stronger neural summation, and the tapetum lucidum, while humans retain sharper daytime detail and full trichromatic color. The comparison is useful for setting realistic expectations: cats are not seeing in total darkness, which is impossible without photons, but they exploit faint light far more effectively than we do. Reviewing the two visual systems side by side highlights how each is tuned to a different niche, the diurnal generalist primate versus the crepuscular ambush predator.