Retrobulbar optic neuritis due to Hodgkins Lymphoma

21 yo male went to the student health clinic complaining of a worsening pain/pressure behind both eyes and headache. He had no photophobia or vision changes. His medications were ibuprofen, flonase and singulair. Initial exam was nonfocal except for tenderness along the posterior neck muscles. He was diagnosed with tension headaches and prescribed prednisone 50mg qd for five days and cyclobenzaprine prn. After the headaches resolved, he developed blurred vision OS. VA was 20/20 OD and 20/50 OS. Color vision was 10/10 OD and 6/10 OS. There was an RAPD OS. Slit lamp exam and remainder of dilated eye exam were normal. HVF 24-2 showed temporal field loss OS MD -9.82 db. A diagnosis of retrobulbar optic neuritis was made.