As Pau has said you're trying to hard. Relax your gaze and remember to blink as you turn the page.
If you're staying locked check that you're not going cross-eyed or straining. In fact if you have trouble regaining your focus stop looking for the blip use soft focus and the Imaginary X-technique.
If you want to practice expanding your peripheral vision watch TV side on. Most people already use it when driving.
Alex
