Like almost half the globe I have astigmatism: > People with astigmatism (aproximately 50% of the population) find it harder to read white text on black than b

Like almost half the globe I have astigmatism: > People with astigmatism (aproximately 50% of the population) find it harder to read white text on black than black text on white. Part of this has to do with light levels: with a bright display (white background) the iris closes a bit more, decreasing the effect of the "deformed" lens; with a dark display (black background) the iris opens to receive more light and the deformation of the lens creates a much fuzzier focus at the eye. > Jason Harrison – Post Doctoral Fellow, Imager Lab Manager – Sensory Perception and Interaction Research Group, University of British Columbia > Jason Harrison – Post Doctoral Fellow, Imager Lab Manager – Sensory Perception and Interaction Research Group, University of British Columbia Borrowed from this answer in stackoverflow: https://graphicdesign.stackexchange.com/questions/15142/which-is-easier-on-the-eyes-dark-on-light-or-light-on-dark https://graphicdesign.stackexchange.com/questions/15142/whic...