Yes. An especially useful trick to remember if you find the conscious mind wants to start reading while you are PhotoReading. Also when you get near the end of the book and the pages become difficult to separate. Close the book turn it over and PhotoRead from the back to the front. You can work your way all the way to the front or just enough to cover those missing pages.
PhotoReading a book both ways is good for those books where the pages stick together. Just ignore the multiple pages you turned and PhotoRead the book the other direction. You'll catch those skipped pages. Not only is the mind brilliant at reading upside down. It puts it in order (those pages numbers aren't just for decoration
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Alex