His parents should make sure he gets physical therapy while at home. They can also be trained in the exercises to do when the P/T is not there since usually no one gets a lot of P/T hours. The doctor should be able to give him a referral.
Although he has to keep the entire leg immobilized for at least 30 days, I dont see why he couldn't ay least start some therapy to maintain some of upper body strength once he feels up to it. I'm sure his Mom will help with that, and DH could probably help too - with his history of back surgeries and physical therapy.
I just don't how much the added injury of the cornea abrasions will set him back on top of everything else!