Blind Spot and "Filling In" Illusions

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram CDF Player or other Wolfram Language products.

Requires a Wolfram Notebook System

Edit on desktop, mobile and cloud with any Wolfram Language product.

Select "black bar" or "yellow disk." Close your left eye and fix your right eye on the cross on the left. If your eye is about 12 inches (30 cm) away from the monitor, it should appear that the black dot and the red cross disappear. Why? Because in each eye, the optic nerve displaces the photoreceptors in a particular area.

[more]

Now to explore the "filling-in" phenomenon, which works by "filling in" the most probable stimulus in a "blind spot" area. Thus, for the first illusion, the most probable stimulus would be blank space; for the second, a black bar; and for the third, a yellow disk.

[less]

Contributed by: Nathan Lian (February 2016)
Open content licensed under CC BY-NC-SA


Snapshots


Details

Reference

[1] Colorcube. "Blind Spot and the 'Filling-in' Phenomenon." (Feb 8, 2016) www.colorcube.com/illusions/blndspot.htm.



Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.
Send