Optical Illusions

Optical Illusions

From a personal perspective, optical illusions occur due to the time difference between the moment the eyes take up information from the environment and the time the brain takes to process that information to create an image. A study by Franchak (2019) linked the movement of the head and the eyes to an observer’s active exploration, which had an impact on the stability of their perception of the visual environment. Naturally, the eyes tend to move over an image or the environment quickly and imperceptibly, picking up a lot of information. This information creates repeating patterns that create a puzzle for the brain to figure out. The brain may take time to piece together the patterns and create a clear image. In this case, the brain actively attempts to contextualize the image based on the information picked by the eyes. However, the brain may miss some information and insufficiently process the patterns or piece the puzzle together, creating a distorted translation of what the eyes see. Subsequently, this results in the optical illusion seen.

Although the eyes and the brain play interrelated roles in visual perceptions, optical illusions are related more to the brain than the eyes. Visual perception is based on how the light reflecting from an image enters the eyes and how the brain processes such relayed light to create a visual image. The eyes just relay information from the environment to the brain to process, interpret, and create the perception of the world. Based on the fact that it takes 13 milliseconds for the human eye to process an image and an average of 150 of focused visual attention for the brain to process and interpret an image (Zhou et al., 2019), the brain is, therefore, more linked to the illusory perception.

References

Franchak, J. M. (2019). Looking with the Head and Eyes. Perception as Information Detection, 205–221. https://doi.org/10.4324/9780429316128-13

Zhou, S., Gordon, M. L., Krishna, R., Narcomey, A., Fei-Fei, L., & Bernstein, M. S. (2019). HYPE: A Benchmark for Human eYe Perceptual Evaluation of Generative Models. In H. Wallach, H. Larochelle, A. Beygelzimer, F. d’Alché-Buc, E. Fox, & R. Garnett (Eds.), Advances in Neural Information Processing Systems 32 (NeurIPS 2019). https://hype.stanford.edu.

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Seeing Is Not Believing!( 210 4)

Seeing is a process that begins with the presence of light. An image is formed on the retina, and an electrical impulse is then transmitted to the brain. Perception includes many factors in addition to this seemingly simple mechanism. Our perceptions are influenced by our past experiences, imagination, and associations. Visual attention requires information to be processed in many different parts of the brain. To see an image, the brain must convert information from both the right and the left eyes and then create a steady image, and then apply meaning.

Optical Illusions

Revisit the information in your reading about optical illusions and look at the picture below.

Optical Illusions of enigma and face or vase

Optical illusions occur because our brain is trying to interpret what we see and make sense of the image based on the information it has about the world around us. The information gathered by the eye is processed by the brain, creating a perception that does not match the true image.

For about 200 years, artists, psychologists, and neuroscientists have questioned if the type of illusions shown there originate in the eye or in the brain. Explain your view on how optical illusions work. Do you think optical illusions are related more to the eye or the brain? Provide your rationale.

Keywords: Optical illusions and the brain, Microsaccades, Enigma illusion, Visual systems, and optical illusions
TEXTBOOK:
Ward, J. (2019). The Student’s Guide to Cognitive Neuroscience (4th Edition). Taylor & Francis. https://purdueuniversityglobal.vitalsource.com/books/9781351035163