Aphantasia is a phenomenon in which people are unable to visualize imagery. While most people are able to conjure an image of a scene or face in their minds, people with aphantasia cannot. If you were to ask a person with aphantasia to imagine something, they could likely describe the object, explain the concept, and say facts they know about the object. But that person would not be able to experience any sort of mental image to accompany this knowledge.
People in the field of afterlife studies who use guided imagery should know that many people will not be able to follow their instructions. To overcome that problem, they should include statements such as “you will see or have the sense of.”
The videos that follow are of woman describing their aphantasia.