Transverse myelitis or TM may be a clinical presentation of APS according to doctors, Hehdi, Uthman and Khamashta. One symptom associated with TM is neuromyelitis optica which causes eye pain. One can be tested for an antibody marker called NMO-igG.
Personally, I am trying to distinguish symptoms of TM from my APS diagnosis. The more info that we can share the better.