Think of the judge as if she were a jury. The evidence has to be presented to you in court. A lawyer can't keep something back that hasn't been presented, even if it's in a bundle, or a bin liner.
Prosecution have shown their evidence, that's what they've been doing the last few weeks. They've rested now. It's now the turn of the defense. They will cross-examine OP eventually and can only refer to evidence that he has already seen. It's that straight-forward.
And the evidence has been presented to the judge, and disclosed to the defence. It just hasn't all been read out in court.