A new study by Zahide Pamir and Huseyin Boyacı has been published in Vision Research. In this study, it is shown that perceived contrast is affected by context-dependent lightness of equiluminant backgrounds. More specifically, when identical gratings are superimposed on equiluminant backgrounds, the one on the perceived-lighter background appeared to have higher contrast. Results showed that perceived contrast is not driven only by the localized features of a retinal image, instead visual system uses lightness information to determine perceived contrast. Click here for the full article.