Subjective size perception depends on central visual cortical magnification in human v1.

The effect remained highly significant also when illusion strengths were corrected by subtracting the bias measured for the control stimuli (small: ρ = 0.4, p = 0.004, [0.14, 0.61]; large: ρ = 0.39, p = 0.005, [0.11, 0.61]).

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While the correlation between left visual field illusion and right V1 area did not reach statistical significance in our present study, it was not different in sign from the corresponding correlation between right visual field illusions and left V1 area.

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