If you try sneaking does that effect your sight any? (select the Sneak icon on the secondary skill menu after clicking on that icon by your character's portrait, then right click on the ground somewhere)
How about if you summon a doll, is their sight the same?
Someone else ran into a similar problem with the after game BF awhile ago. The topic below contains a few suggestions you can try, though they didn't help much in that case.
problem in battlefields after winning game