Welcome to HCM.
From the above mentioned symptoms, I think your child is suffering from ptosis( drooping of eye lid) due to third cranial nerve paralysis
a sequelae of tubercular meningoencephalitis
. All he needs right now is appropriate anti tubercular medications, which by now I think your emergency management doctors would have already started on, and an neuro ophthal opinion to keep an eye of his optic nerve status too( as multiple cranial nerve palsy
is commonly noted).
Once he is out of the critical stage, the ptosis should recover if it is due to TB infection.The brain with its multiple complex nervous system and spinal cord
are quite complicated, as the recovery depends on each individual and the extent of his Tubercular spread. However, neurologic sequelae may remain despite proper therapy in cases of severe tuberculous meningitis
So let's hope for the best for him and wish him a speedy recovery.