Image of the Week: What's the cause of these lesions and vision loss?

An otherwise healthy 29-year-old woman presents to the emergency department with new-onset blurred vision. She mentions a history of recurrent oral aphthous ulcers and occasional painful genital lesions over the past year. On examination, well-defined oral ulcerations and vulvar scarring are seen. Bilateral inflammation throughout the uveal tract is evident on slit-lamp examination. What is this patient most at risk ...