APMPPE is an inflammatory vasculitis of the choroid, leading to hypoperfusion and ischemic injury of the RPE with subsequent lesion formation. APMPPE may be preceded by a viral prodrome or vaccination, both of which were seen in this case. Choroidal inflammation seen in APMPPE is therefore thought to stem from immune-mediated processes. Unilateral cases often have fellow eye involvement within days to a few weeks. Single eye involvement with delayed contralateral presentation, as seen in our patient, is rare. This case demonstrates that lesion resolution in one eye can be followed by contralateral eye involvement up to 31 months later, highlighting the importance of routine ophthalmic monitoring for patients with unilateral APMPPE.