An eye examination can usually diagnose the disorder. No special tests are usually necessary.
Goldstein DA, Tessler HH. Episcleritis, Scleritis, and Other Scleral Disorders. In: Yanoff M, Duker JS, Augsburger JJ, Azar DT. Yanoff: Ophthalmology. 2nd ed. Philadelphia, Pa: Mosby; 2004:chap 64.
O'Day DM, Horn JD. The Eye and Rheumatic Disease. In: Harris ED, Budd RC, Genovese MC, Firestein GS, Sargent JS. Harris: Kelley's Textbook of Rheumatology. 7th ed. Philadelphia, Pa: Saunders Elsevier; 2005:chap 44.