Vertical Peripheral Drift

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Stare at this Vertical Peripheral Drift illusion and you should see an up and down wave like pattern caused by the phenomenon of Peripheral Drift.

If you are interested in learning more about how this Vertical Peripheral Drift Illusion works, scroll down to read more about it.

Vertical Peripheral Drift


Table of Contents

What is the Vertical Peripheral Drift Illusion?

This Vertical Peripheral Drift works based on the principles of Peripheral Drift.

Peripheral drift is an optical illusion that occurs when stationary patterns, such as stripes or grids, appear to move or “drift” in the peripheral vision of an observer. The illusion is created by the way the brain processes visual information from the retina, which can cause the edges of the patterns to appear to blur or vibrate slightly.

The effect is more pronounced when the patterns are high-contrast, such as black and white stripes, and when the patterns are presented in the periphery of the visual field. The illusion can be enhanced by adding motion to the patterns or by varying the width or spacing of the stripes.

Peripheral drift is thought to be caused by a combination of factors, including the way the brain processes spatial frequency information, the interactions between adjacent visual neurons, and the effects of eye movements and fixational eye movements.

Peripheral drift is a well-known phenomenon in vision science and has been studied extensively as a way to better understand the mechanisms of visual processing in the brain.

How does the Vertical Peripheral Drift Illusion Work?

This Vertical Peripheral Drift works based on the principles of Peripheral Drift.

Peripheral drift is an optical illusion that occurs when stationary patterns, such as stripes or grids, appear to move or “drift” in the peripheral vision of an observer. This illusion is caused by the way the brain processes visual information from the retina.

The retina is the part of the eye that receives visual input from the environment and sends it to the brain for processing. The retina is made up of cells called photoreceptors, which detect light and send signals to other cells in the retina, called retinal ganglion cells.

The retinal ganglion cells are organized in a way that allows them to detect different aspects of the visual scene, such as edges, color, and motion. Some cells are sensitive to low spatial frequencies, meaning they respond best to wide, low-contrast patterns, while others are sensitive to high spatial frequencies, which means they respond best to narrow, high-contrast patterns.

When an observer views a stationary pattern of high-contrast stripes in their peripheral vision, the edges of the stripes appear to blur or vibrate slightly due to the interactions between adjacent visual neurons in the retina. These slight movements are then interpreted by the brain as motion, which creates the illusion of drifting.

Additionally, eye movements and fixational eye movements, which are small involuntary movements of the eyes, can also contribute to the perception of drifting. As the eyes move and fixate on different points in the visual scene, the edges of the patterns can shift slightly, which can enhance the illusion of movement.

Overall, peripheral drift is a complex phenomenon that involves multiple factors in both the retina and the brain. Studying this illusion can provide valuable insights into the mechanisms of visual processing and perception.

Some Similar Illusions

There are several illusions that are similar to the vertical peripheral drift illusion. These include:

  1. Motion aftereffect: This illusion occurs when you stare at a moving pattern for a period of time, and then look at a stationary object. The object will appear to move in the opposite direction of the original pattern.
  2. Waterfall illusion: This illusion is similar to the motion aftereffect but involves a continuous stream of motion. When you stare at a waterfall for a period of time, the stationary rocks next to it may appear to move in the opposite direction.
  3. Pinna-Brelstaff illusion: This illusion involves a spiral pattern that appears to rotate when you move your head. However, the illusion is actually created by the way the pattern is designed and can occur even when you’re not moving.
  4. Rotating snakes illusion: This illusion involves a series of interlocking circles that appear to rotate even though the image is static.
  5. Café wall illusion: This illusion involves a pattern of black and white tiles that appear to be slanted, even though they are actually straight.

All of these illusions, like the peripheral drift illusion, are caused by the way the neurons in the visual system respond to certain types of visual stimuli. They are all examples of how the brain can be tricked into perceiving motion or other distortions in static images.

Discovery of Peripheral Drift Illusion

The vertical peripheral drift illusion is a visual phenomenon that has been observed and studied by many researchers over the years, and it is not attributed to any single discoverer.

The peripheral drift illusion was actually first described by Jocelyn Faubert in 1991. Faubert is a Canadian visual neuroscientist who first observed the illusion while studying the perception of complex motion patterns. He named the phenomenon “drifting texture” and published his findings in the journal Vision Research in 1991.

Faubert’s work on the peripheral drift illusion was important because it helped to highlight the importance of studying visual processing at the level of the visual system rather than just focusing on the properties of individual stimuli. Since Faubert’s initial description of the phenomenon, the peripheral drift illusion has become an important tool for studying the mechanisms of visual perception and has led to many insights into how the brain processes visual information.


References and Resources

In addition to the vertical peripheral drift Illusion, check out our complete list of illusions and this Waving Squares Illusion which is cool peripheral drift illusion too!