I did not have ReA mine started with Reiters Syndrome. Either case the suspiciousness of your symptoms and the inflammatory process is the "marker" not necessarily a Dx. The 2nd opinion outside of your milieu is key, at least in my opinion. Yes Uveitis can be a inflammatory process on it's own but in the presence of signs like yours it would be prudent to thoroughly investigate the AS. In the meantime, is your Rheum compatible with the idea of moving to a biologic and tapering the prednisone after say 3 months into treatment? Just an idea.

Diagnosed AS 2001.
Started Remicade 2002 - 5mg/kg every 7 weeks.
Right Eye Trabeculectomy/lens replacement 2006.
Right eye DSEK Cornea Transplant 2009.
Right eye Ahmed Shunt 2016.
Right eye DSEK Cornea Transplant 2016.
Supra Ventricular Tachycardia. Radio Frequency Ablation 2008.
Cardiac Stent to RCA 9/2020

ICU RN - Seattle, WA
~Grasp The Challenge and Succeed~