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Black and white diagram of the M r-Lyer optical illusion with two lines; top line has inward arrowheads, bottom line has outward arrowheads.

Black and white diagram of the M r-Lyer optical illusion with two lines; top line has inward arrowheads, bottom line has outward arrowheads.
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Black and white Müller–Lyer optical illusion diagram. Two straight horizontal black lines of exactly the same length. Top line has arrowheads pointing inward (< >). Bottom line has arrowheads pointing outward (> <). Plain white background. Flat 2D educational illustration. Perfect symmetry. No artistic style, no perspective, no shadows. High contrast. See more

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