Weight loss and vision disturbance

I’ve recently had two episodes of involuntary weight loss. The first around December and the second after a week of cortisona treatment.
I had an mri and it detected a brain inflamation which is still under investigation but I have been having headaches, weight loss and recently eye floaters and a strange feeling in my right eye.

I’ve done several blood tests and all of them were normal. I’ve also been in Indonesia last September and while there I got a parasite infection.

Any idea of what could link all this symptoms together?