In a series of experiments, we demonstrate changes in the perception of the neutral focus after a period of adaptation to astigmatic images.
The work is collaborative study between our lab and the University of Reno (Webster's lab) and Indiana University. The full paper has just appeared in the Journal of Vision. Full reference: Sawides et al. "Adaptation to Astigmatic blur", Journal of Vision, 10, 12, Article 22, (2010)