 A deviation from the natural perception of objects (stimulus) encourages evaluation of the theories of perception.Visual perception in schizophrenia is distinguished by reduced contextual adjustments and a more accurate perception of the stimulus in tasks involving ‘spatial contextual effects’.According to Eunice et al., “contextual illusions arise from vision’s adaptive propensity to emphasize relative differences among features rather than their absolute characteristics.” While the presence of a high-contrast background reduces the apparent contrast of smaller foreground features in healthy individuals, schizophrenic patients are more accurate in perceiving the contrast between the background and foreground.