H49.1 - Fourth [trochlear] nerve palsy H49 - Paralytic strabismus H49.1 - Fourth [trochlear] nerve palsy
H49.10 - Fourth [trochlear] nerve palsy, unspecified eye H49.11 - Fourth [trochlear] nerve palsy, right eye H49.12 - Fourth [trochlear] nerve palsy, left eye H49.13 - Fourth [trochlear] nerve palsy, bilateral