Sentence:  Psychical blindness is a condition in which there is a total absence of visual memory-images , a condition in which , for example , one is unable to remember something just seen or to <WSD>conjure</WSD> up a memory-picture of the visible appearance of a well-known friend in his absence . 
Meaning of the word marked with <WSD> tags:  summon into action or bring into existence, often as if by magic