Hermann Grid Illusion: How it Works
The Hermann Grid illusion is probably one of the moerst famous illusions. It was created by Ludimar Hermann in 1870.
How it Tricks Your Brain:
The contrast of the white and black causes 'lateral inhibition. Lateral inhibition is the capacity of an excited neuron to reduce the activity of the other neurons. In the case of the Hermann grid, there is light coming from the four sides of the intersection, but from only two sides of a band going away from the intersection. This causes you to see little black dots.
Works Cited"Hermann Grid Explanation." Hermann Grid Explanation. N.p., n.d. Web. 20 Mar. 2015."Hermann Grid." Grid Illusions:. N.p., n.d. Web. 18 Mar. 2015.https://www.youtube.com/watch?v=rfdJyDfIHIc"IllusionWorks - Hermann's Grid - Explain." IllusionWorks - Hermann's Grid - Explain. Illusion Works Llc, 1997. Web. 16 Mar. 2015.