Central Retinal Vein Occlusion (CRVO) Diagnosis
Your ophthalmologist will widen (dilate) your pupils with eye drops and check your retina.
They may do a test called fluorescein angiography. Yellow dye (called fluorescein) is injected into a vein, usually in your arm. The dye travels through your blood vessels. A special camera takes photos of your retina as the dye travels throughout the vessels. This test shows if the retinal vein is blocked.
People under the age of 40 with CRVO may be tested to look for a problem with their blood clotting or thickening.