Aphantasia is a phenomenon in which an individual cannot conjure an image of a face or thing in their minds. There is no inner ‘mind’s eye’ in these people and the mental imagery is essentially blank. People with Aphantasia can explain the object using words, but the mental image isn’t experienced.
Signs of Aphantasia include unable to vividly picture someone in one’s mind. It is estimated that about 1% to 3% of the population might be having Aphantasia.