That sounds a lot like the experiences I have, seventyeight. I know that everyone dissociates to some degree. The example that's always given is driving from point a to point b without remembering how you got there. Our brains can function on "autopilot" for a time, especially with tasks that are overlearned. But the other type of dissociation (or I should say, somewhere else on the continuum of dissociation) that you describe seems to me to be more of a function of anxiety. When I approach anxiety-provoking territory (e.g., talking about my relationship with my therapist or certain aspects of my past), I get kind of fuzzy in the head and can't really focus very well, visually or in terms of the words I'm saying/taking in. There are two other concepts, which I think are also related to dissociation - depersonalization and derealization - where people feel as if they are watching themselves from the outside, and feel as if others and/or their surroundings aren't real, respectively. Sounds like you're maybe experiencing the latter?

What is it like in those moments with your therapist? Is she aware that you're having difficulties focusing?