Welcome to the forums,
I'm very sorry your Victor is sick.
Hopefully with the current treatment he will start to feel better and the eye infection is cleared.
While it's good that he has sudden bursts of energy, during this time it's important to at the very least try to confine the area where he has out of cage time in, or even better to keep him on the hospital cage so that he doesn't exert or strain himself too much.
It's extremely important that he preserves his energy during the recovery process.
You can also keep him extra warm by covering the cage on 3 sides with a light blanket. If need be, you can place a heating pad or hot water bottle underneath the cage's bottom.
Supplementing Victor's diet with egg food can also prove quite useful at this time.
Continue to keep a close eye on Victor, if you notice a change on him and he seems to be struggling more, then you may have to call back the vet's office and book an appointment much sooner than the one you have scheduled.
I hope Victor feels better soon and I'm wishing him a steady and full recovery.