Jastrow illusion
Jastrow illusion refers to a curve of equal length, where the lower one appears longer than the upper one from a normal perspective; Similarly, an identical fan-shaped ring creates a visual illusion where the lower fan-shaped ring appears larger than the upper fan-shaped ring.
The Jastrow illusion is an optical illusion discovered in 1889. Due to the different placement positions, there is a phenomenon of deceiving the visual perception by comparing the long and short sides, resulting in errors.
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