The Hermann Grid Illusion Revisited

@article{Schiller2005TheHG,
  title={The Hermann Grid Illusion Revisited},
  author={Peter H. Schiller and Christina E. Carvey},
  journal={Perception},
  year={2005},
  volume={34},
  pages={1375 - 1397}
}
The Hermann grid illusion consists of smudges perceived at the intersections of a white grid presented on a black background. In 1960 the effect was first explained by a theory advanced by Baumgartner suggesting the illusory effect is due to differences in the discharge characteristics of retinal ganglion cells when their receptive fields fall along the intersections versus when they fall along non-intersecting regions of the grid. Since then, others have claimed that this theory might not be… 

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