It’s cranial pressure and sixth nerve palsy. As my cranial pressure goes up my horizontal eye nerves weaken causes vision to go double. Prism glasses fixes thi

It’s cranial pressure and sixth nerve palsy. As my cranial pressure goes up my horizontal eye nerves weaken causes vision to go double. Prism glasses fixes this. But it’s a completely different power. +3 goes to -1 or anything in between. As pressure goes down it reverts. Medication or activity can drop or raise it in an hour or less.