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Eyeball "after-shadow" helps to see the world clearly

 Last Update: 2021-08-13
 Source: Internet
 Author: User

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Eyeball "after-shadow" helps to see the world clearly

"Afterimage" of the eyeball helps to see the world clearly

When people are looking at a scene, high-speed eye movements will produce "streaks" on the retina (picture on the right).
Although people cannot perceive these "streaks", the eyes use them to maintain a coherent field of vision
.

Photo courtesy of author Martin Rolfs

When people are looking at a scene, high-speed eye movements will produce "streaks" on the retina (picture on the right).

When people are taking pictures with their mobile phones or cameras, rotating the lens quickly may get the afterimage of the photo like water waves
.

In fact, a similar phenomenon can occur with rapid eye movements-saccades

Rapid eye movements continuously move objects on the retina
.

Eye movements that last only a few hundredths of a second leave a layer of information-filled "stains" on the retina

When looking at a scene, people’s eyes sweep from one point to another about three times a second
.

Although people cannot perceive this fast movement, experiments have shown that the visual information it produces helps people understand the world around them

In order to see clear details, a person's eyes are often shifted to the objects of their peripheral vision
.

These extremely fast eye movements can produce "movement streaks" on the back of the eyes, which are visual blemishes

In a study recently published in Science Advances, Richard Schweitzer and Martin Rolfs of the Humboldt University in Berlin, Germany, showed volunteers six objects with different patterns and asked them to focus on one object
.

When the volunteer's eyes moved towards the target, the position of the object changed

In most cases, participants can successfully find the target, but if the target's movement produces movement streaks, they are more likely to find the target
.

This shows that the information collected from the stripes helps people’s fast-moving eyes track the location of objects