OK, finally got you picture up. You may well have to loosen that center screw. Look for a small screw somewhere in the ocular that looks like it might attach the eyepiece to the tube coming up from the faceplate. If that comes out, you may have to get the screw in the picture out and the ocular assembly might lift free.
The problem is that the screw slot in the picture looks messed up beyond redemption. You may be able to refile a wider slot, not deeper, just wider. Going deeper gets you nowhere. Just wider till the small file just fits. Gently use the file as a handle to loosen the thing.
Now understand, I MAKE NO CLAIMS ABOUT KNOWING ANYTHING ABOUT BINOCULAR REPAIR.
Having said that I think you may have too much to handle there.
The moving spot is likely on a lens and the stationary spot is likely on the prism. If you succeed in getting to the prism assembly, that will take serious equipment and know how to disassemble, clean, and in particular to REASSEMBLE.
I'm now out of my depth. I wish you good luck. I also suggest (but you probably have already) that you do a Google search. You might find some sort of guide.
What make and model are these binoculars?
Edited by Klamath - November/20/2010 at 14:46