Complex sentence: After that, the patient moves up the hierarchy to the next condition, such as a picture or movie of the object of fear, and then to the next level in the hierarchy and so on until the patient is able to cope with the fear directly.
Split into simpler sentences: After that, the patient moves up the hierarchy to the next condition, such as a picture or movie of what they fear. Then to the next level in the hierarchy and so on until the patient is able to cope with the fear directly.