Imagine around the frontal bases of your optical nerves where they connect to your eyes there were small ring type things, with razor sharp metal doors that would slowly close around the it like a camera shutter over the course of 20 minutes at which point the nerves would be entirely severed resulting in absolute blindness. Leading up to this point, what would you see?

As a side inquiry, were any of the raw procedure reports from unit 731 ever made public and uploaded to the internet?