Robert Peterson calls this "earth-sickness"
Your physical reflexes and expectations are clouding your experiences... The lack of sight is usually caused by the fact that you're looking through your physical eyes, where there is nothing but darkness since they are closed... Not being able to go through things is also caused by your expectations, this thing in your mind that says "there's just no way you can go through there."
I don't think it would indicate that it was "just a dream" -- the reason is simple: if it were a dream, why wouldn't you have been able to go through the wall? :p
Anyway, my advice would be to issue voice commands. When you have difficulty doing something, state out loud what it is you want to do. In the physical, we usually have two parts to us, one that thinks, and one that does. No matter how hard you think "move" at a ball, it probably won't move until you transfer the thought into movement and kick it away. When you issue the voice command in an OBE, it kind of throws your intention out there, and it empowers you to do the things you want, rather than merely thinking about them. After a while of doing this, you'll realize that you don't need to say it for it to happen anymore...
It's all a matter of realizing your infinite potential, the fact that the only thing that is preventing you from doing the things you want is yourself.
And for the vision part, you can try to do an exercise in the physical, when you're about to fall asleep and see images as you described; simply try to stay and look at the pictures without letting your physical sight call you back into the darkness of your eyelids. This skill is actually important for more than just sight; to have a full out of body experience with all human senses, it's important to be able to fully "forget" about physical senses and detach from all of them (touch is actually the most important).
Your physical reflexes and expectations are clouding your experiences... The lack of sight is usually caused by the fact that you're looking through your physical eyes, where there is nothing but darkness since they are closed... Not being able to go through things is also caused by your expectations, this thing in your mind that says "there's just no way you can go through there."
I don't think it would indicate that it was "just a dream" -- the reason is simple: if it were a dream, why wouldn't you have been able to go through the wall? :p
Anyway, my advice would be to issue voice commands. When you have difficulty doing something, state out loud what it is you want to do. In the physical, we usually have two parts to us, one that thinks, and one that does. No matter how hard you think "move" at a ball, it probably won't move until you transfer the thought into movement and kick it away. When you issue the voice command in an OBE, it kind of throws your intention out there, and it empowers you to do the things you want, rather than merely thinking about them. After a while of doing this, you'll realize that you don't need to say it for it to happen anymore...
It's all a matter of realizing your infinite potential, the fact that the only thing that is preventing you from doing the things you want is yourself.
And for the vision part, you can try to do an exercise in the physical, when you're about to fall asleep and see images as you described; simply try to stay and look at the pictures without letting your physical sight call you back into the darkness of your eyelids. This skill is actually important for more than just sight; to have a full out of body experience with all human senses, it's important to be able to fully "forget" about physical senses and detach from all of them (touch is actually the most important).