For the full story of what happened on Kaios, check out Andrew's City of the Watcher trilogy! 

And by the way, this isn't the first glimpse we've had of the infamous interdimensional terrorist Jack Waghalter. A photo of Waghalter from when he had two eyes was featured on a slide in a Reality Patrol training lecture Agent Sojac attended as a cadet, as seen back in Chapter 1.4.