Reeves, AdamGrayhem, RebeccaHwang, Alex D.2018-03-202018Reeves, Adam, Rebecca Grayhem, and Alex D. Hwang. 2018. “Rapid Adaptation of Night Vision.” Frontiers in Psychology 9 (1): 8. doi:10.3389/fpsyg.2018.00008. http://dx.doi.org/10.3389/fpsyg.2018.00008.http://nrs.harvard.edu/urn-3:HUL.InstRepos:35014699Apart from the well-known loss of color vision and of foveal acuity that characterizes human rod-mediated vision, it has also been thought that night vision is very slow (taking up to 40 min) to adapt to changes in light levels. Even cone-mediated, daylight, vision has been thought to take 2 min to recover from light adaptation. Here, we show that most, though not all adaptation is rapid, taking less than 0.6 s. Thus, monochrome (black-white-gray) images can be presented at mesopic light levels and be visible within a few 10th of a second, even if the overall light level, or level of glare (as with passing headlamps while driving), changes abruptly.en-USmesopic visionscotopic visionadaptationvision recoveryHDRJournal Article2018-03-2010.3389/fpsyg.2018.00008