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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References

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A stereoscopic presentation of the hermann grid
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TLDR
The results suggest that a purely local model for the Hermann grid illusion is not a complete explanation, and global factors must be involved.
The Hermann Grid Illusion: A Tool for Studying Human Perceptive Field Organization
TLDR
The Hermann grid illusion is weakened when the grid is presented diagonally, which suggests a contribution by the orientation-sensitive cells in the lateral geniculate nucleus and visual cortex, and is consistent with the reduction of the center—surround antagonism in retinal receptive fields.
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TLDR
The quantitative reduction of the HGI elicited by the oblique pattern tested and its reduction to almost zero in some subjects, constitute a benchmark for any model aimed at explaining the Hermann grid illusion on psychophysical grounds.
Illusory colour changes in Hermann grids varying only in hue
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TLDR
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TLDR
An optimum grid was devised that shows maximum brightness changes at almost every intersection, even when fixated foveally, and is interpreted in terms of Baumgartner's receptive field hypothesis.
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