No. The medical procedure will take place in a hospital under guard. When he is released from the hospital, he'll be transported to his current facility and do rehab there. They will have him on work restriction or whatever the doctor orders. But no one gets released for medical reasons unless they are in hospice.

Yes, eyeglasses are permitted in every classification of prison and/or jail. Just be sure to disclose that you are bringing them so that they do not see you passing the inmate something which is certain to cause a big ruckus.

The federal system will allow the prostetic leg. We cannot find a state system that disallows prostetic limbs, and unless there are come county jails out there that prohibit it for some archane reason will don't see it as a problem. The only thing they will NOT allow is a toupee. 

This depends on where they are incarcerated. The federal system is by far the best for medical attention and the state system is adequate... but the rule of thumb is to "not get sick", unfortunately that is easier said than done but it is minimal attention at best. Most facilities will charge the inmate some sort of fee for medical attention that is taken from the inmate's commissary account. If they are indigent, then the state or feds will pick

call the warden or the chaplain at the facility, if that fails, call your congressman, if that fails take your story to the press

Contact lens or glasses are permitted in federal prison. He can buy reading glasses and "artificial tears" which would act as the solution for the contacts, at the commissary if you go that route. If you know his approximate size just guess and get something that is durable and scratch proof.

There are limited medical and dental recourses in the state prison system. Dental emergencies are largely remedied by pulling the tooth/teeth affected, not mending them. They never offer a cosmetic choice. If your inmate has dentures already, he can receive them but in no way will the state foot the bill for new dentures.

You can send your inmate one pair of prescription glasses. There are no guidelines for the type of frames allowed, we would advise something that is durable. If he breaks them, you can send another pair. 

It is pretty good for state prison, although it is best to never get sick while incarcerated as the output is minimal. There is a nurse on staff 24/7, inmates can put in for a doctor visit but might have to pay a small amount from their commissary account as a co-pay.

He will be safe. He will get plenty of medical help and if we know human nature, the other inamtes will make it their business to make sure he is getting better. Inmates make make calls after they have completed the requisite orientation.