An optical illusion is captivating internet users by creating a surprising visual effect. The illusion involves looking at a dot in the center of an image for about 15 seconds and then shifting one's gaze to a blank white space. This action causes a temporary afterimage of a face to appear on the white background.

This phenomenon is known as a photoreceptor fatigue illusion, or a negative afterimage illusion. It happens when the cone cells in the eyes, responsible for color vision, become less sensitive after staring at a specific color for an extended period. When the eyes then focus on a white surface, the brain perceives the complementary color of the original image because the fatigued cones send weaker signals. This effect is temporary, with the cones typically regaining their sensitivity within 10 to 30 seconds. The illusion has gained significant attention online, with many users expressing surprise and amusement at the resulting visual.

Original article

Actionable Information: There is no actionable information provided. The article describes an optical illusion and how to experience it, but it does not offer any steps or instructions that a person can implement for a real-life benefit.

Educational Depth: The article provides some educational depth by explaining the scientific principle behind the illusion, identifying it as a photoreceptor fatigue illusion or negative afterimage illusion. It details how cone cells in the eyes become less sensitive and how the brain perceives complementary colors. However, it does not delve into deeper historical context, variations of the illusion, or more complex scientific explanations.

Personal Relevance: The topic has very low personal relevance for a normal person's daily life. While it's an interesting phenomenon to experience, it does not impact health, finances, safety, or any other significant aspect of a person's life. It's a fleeting visual curiosity.

Public Service Function: The article does not serve a public service function. It does not offer warnings, safety advice, emergency contacts, or tools for public benefit. It is purely descriptive of a visual phenomenon.

Practicality of Advice: There is no advice given in the article, so its practicality cannot be assessed.

Long-Term Impact: The article has no long-term impact. Experiencing the illusion is a temporary amusement and does not contribute to any lasting personal development, planning, or improvement.

Emotional or Psychological Impact: The article might evoke mild surprise or amusement due to the nature of the illusion. However, it does not offer any tools or insights for emotional regulation, problem-solving, or building resilience. It is unlikely to cause distress or significant psychological impact.

Clickbait or Ad-Driven Words: The language used is descriptive and informative, not overtly dramatic or sensational. Words like "captivating," "surprising visual effect," and "significant attention" are used, but they do not appear to be manipulative clickbait. The article seems to be explaining a phenomenon rather than trying to drive clicks through exaggeration.

Missed Chances to Teach or Guide: The article missed a chance to provide more practical or educational value. It could have included: * Simple, clear instructions with a visual example of the dot and the expected afterimage. * Links to reputable scientific sources or websites that explain visual perception and optical illusions in more detail. * Information on other types of optical illusions and their underlying mechanisms. * A brief mention of how understanding visual perception can be relevant in fields like art, design, or even understanding certain visual impairments.

The text uses strong words to make the illusion sound exciting. Words like "captivating" and "surprising visual effect" make people want to try it. This helps to make the illusion seem more interesting than it might be. It's like using bright colors to get your attention.

The text explains how the illusion works using scientific terms. It talks about "photoreceptor fatigue illusion" and "cone cells." This makes the explanation sound very official and true. It helps people believe the science behind the trick without questioning it.

The text mentions that "many users expressing surprise and amusement." This suggests that everyone who tries the illusion will have a positive experience. It doesn't mention if anyone might not find it surprising or amusing. This makes it seem like a universally fun thing.

The text conveys a sense of wonder and excitement through its description of an optical illusion. This is evident in the phrase "captivating internet users by creating a surprising visual effect," which suggests a strong positive reaction from people. The word "surprising" itself points to an unexpected and delightful experience, hinting at a feeling of amazement. This emotion is not overly strong but serves to draw the reader in, making them curious about the illusion. The writer uses this to guide the reader's reaction by making the illusion sound interesting and fun, encouraging them to want to learn more or even try it themselves. The overall message aims to share something novel and engaging, making the reader feel a sense of discovery.

The writer persuades the reader by choosing words that create a feeling of intrigue. Instead of simply stating that an illusion exists, they use "captivating" and "surprising" to make it sound more special. This is a way of making the topic sound more exciting than if it were described neutrally. The text doesn't use personal stories or extreme exaggerations, but it does repeat the idea of the illusion being a "visual effect" and the "resulting visual," reinforcing the idea that it's something interesting to see. This repetition helps to focus the reader's attention on the visual aspect and the positive experience associated with it, making the illusion seem more appealing and memorable.