In general, this is beneficial as it allows us to combine these measurements (of brightness, hue, texture) to more efficiently identify an object.It becomes difficult, however, if we need to spot only one aspect of an object."Even when we want and need to focus on one dimension of things we come across every day, such as the texture of your cat's fur rather than its lightness, we have difficulty doing so because our eyes want to survey several features at once," said senior study author Michael Landy from New York University.

The study, which appears in the journal Current Biology, points to the ability of our visual system to integrate multiple components of an item while underscoring the difficulty we have in focusing on a particular aspect of it.Previous studies have shown the human visual system is capable of simultaneously processing several traits of a single object.

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