Check that you are not crossing your eyes. Don't take it for granted that they are not crossed.
Remember to blink and remember to drink plenty of water. If' you are dehydrated when you start PhotoReading you'll find yourself getting a headache since you are using your brain and it needs water to do the work.
Yes it is always necessary to have a soft gaze. Soft means don't force it, relax. It feels like daydreaming.
Alex
