Interferon medicines work by boosting your immune system. They fight things like viruses, bacteria and cancer, and can be used to treat other diseases as well.

Interferon medicine can cause retinopathy. Retinopathy is a disease of the retina that can lead to vision loss. In most cases, retinopathy due to interferon medicine is mild and reversible. However, retinopathy can lead to vision loss. Because of this, you need to see an ophthalmologist while you take interferon. They will examine you and look for early signs of retinopathy.

Symptoms of damage due to interferon include:

• new floaters in your vision
• blurry vision
• dark spots or empty areas in your vision

If you have retinopathy, your ophthalmologist will work with you and your doctor. You can adjust your treatment plan together if needed.

If your retinopathy needs treatment, it will usually be treated with medication that is given by injection.

If you have any questions about your vision, speak with your ophthalmologist. They are committed to protecting your sight.