PhotoReading is not a memory technique. It has nothing to do with achieving an eidetic memory. It is a reading system. That's why it's called PhotoReading
Using the PhotoReading system we are able to remember what we read better. Before coming to PhotoReading about a week after reading a book if you asked me what it was about, my answer would have been vague. Books I PhotoRead I can remember and talk about much later. Even years later. And if I pick up the book again it comes back to me easily what the book was about.
Alex