That would be a good way to describe what I feel as DR. My attention is turned inward, on my thoughts. And when I try to focus on things outside of me, I can see them but it feels like what I am looking at is still in the background of my attention and my thoughts are in the foreground. As if I am having a thousand miles stare. Another way to describe the same thing for me is that there is a kind of black veil over everything. I have read someone also describing it as looking at things through a half tainted mirror. You can see things through it but it is superimposed with the reflection of your own mind.
For me it feels like I am using my mind too much and I got stuck focusing on it. But whenever I am trying to do something about it, I can mostly "try" with my mind only. If I am trying to focus on what's real I quickly go back to using my mind to try to figure out what would be the best way to do that, or theorize about it. Which makes me focus on my mind again.
An analogy of that for me would be when a lot of people start weightlifting and learn benchpress. The point is usually to develop your chest, but depending on your morphology it can be more natural to use the front part of your shoulders instead, but if you do that, your chest will not exercise properly and it will not develop. So there are several tricks to learn to use your chest and not your shoulders. But if you have made this mistake for a long time, your shoulders become more muscular and you get used to use them more, and it becomes very unnatural to use your chest again. And I feel it is similar for me when I try to just look at things without focusing on my mind at the same time. It is so easy to fall back on watching my own mind because my "mind muscle" is very strong, but my "reality muscle" is very weak compared to that and it feels unnatural to use it.
This is just how I perceive it. So when you do benchpress and you have bad habits, one trick can be to reduce the weight and work slowly and gently with the right muscles, so perhaps the analogy with DR would be to try gently and be satisfied with minimal results, I don't know. But I am not saying that the cause of DPDR is a "bad habit", but the difficulty in switching back to reality feels to me a bit the same as in the example.