A visual nudge can disrupt recall of what things look like

Interfering with your vision makes it harder to describe what you know about the appearance of even common objects, according to researchers. This connection between visual knowledge and visual perception challenges widely held theories that visual information about the world -- that alligators are green and have long tails, for example -- is stored abstractly, as a list of facts, divorced from the visual experience of seeing an alligator....

Edmiston, P., & Lupyan, G. (2015) Visual interference disrupts visual and only visual knowledge. Journal of Vision, 15(12), 10. DOI: 10.1167/15.12.10  

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