**6. Infectious keratitis in rheumatic diseases**

#### **6.1. Viral keratitis**

In RA patients inflammatory corneal ulceration may occur as a symptom of this disease. How‐ ever, any such changes require the differentiation from herpes simplex infection, which presents the same clinical picture. The differentiation is important from the point of imple‐ mented treatment, because corneal ulceration in course of RA requires a very intensive immu‐ nosuppressive therapy, which exacerbates an inflammation caused by herpes simplex infection [91].
