hyperphantasia
A condition where one's mental imagery (the mind's eye) is extremely realistic, to the point of confusion with reality.
uncountable
Based on their surveys, Dr. Zeman and his colleagues estimate that 2.6 percent of people have hyperphantasia and that 0.7 percent have aphantasia. […] Charles Darwin left behind writings hinting at hyperphantasia: When he was once asked to recall the objects that had been on his breakfast table that morning, he said they were “as distinct as if I had photos before me.”
Where it comes from
From hyper- + phantasia; from Ancient Greek φαντασία (phantasía, “perception, impression, image, look, appearance”).
Adapted from the Wiktionary entry hyperphantasia (CC BY-SA 4.0).