Write an article based on this "If you wear glasses take a piece of paper, write your notes on it, fold it up and hide it in the hinge. When you are done, fold it back up, put it back and continue. Throw out the paper later on."
When you need them take off your glasses and take the paper and unfold it. If the teacher asks what you're doing say your hinge has a gap and is 'uneven' and you're adjusting the paper.