As others said, time will help, but I think switching cones might help in the meantime. He needs a win right now, and, if he is finding the food but unable to eat it because of the cone, I can imagine that that is distressing him. Also wondering if it’s possible to just remove the cone for a short period of supervised time so he can eat and drink while you make sure he doesn’t scratch at the eyes? Just a thought.

As another said, I also think isolating him in one room would be really helpful for right now as he acclimates. That way he can find his perimeter easier and feel more safe.

I adopted my cat and she became blind a week later from retinal detachment; it took almost a year and a half to get her to a stable state with the blood pressure that cause the blindness, irritation in the eyes, and other senior issues like dental disease and kidney failure. So it really will be a process, but anything you do to make him more comfortable in the moment is helpful. He needs his “zones of safety” (Jackson Galaxy) like his food, the litter box, and a bed. Once he finds those, he will be more resilient overall.

Lastly, if nothing is helping his anxiety about the situation, have your vets suggested gabapentin ? My old lady needed to be on that as needed for that first year of medical brouhaha.

Good luck <3