Blinking no.
Staring yes. Tends to make PhotoReading more of a strain, can cause headaches.
For both drink water, relax and go with the flow.
If you are tired I do suggest that rather than a marathon session with 3 or more books pick one you'd really like to get some information from and have a nap after PhotoReading it.
Often during naps we dream more readily and are more aware of our dreams, you might notice some information about the book coming into your dreams. Even if you cannot exactly remember what it was your dream told you it's great verification that your mind is 'working on it' and hey you only PhotoRead it.
Alex.
