Acute Macular Neuroretinopathy: What to Know

What is acute macular neuroretinopathy (AMN)?

Acute macular neuroretinopathy (AMN) is an eye condition that affects the macula, the small, central part of the retina that is responsible for detailed vision. AMN is characterized by sudden vision loss in one eye that usually occurs in young adults.

What causes AMN?

The exact cause of AMN is unknown, but it is thought to be caused by a combination of factors, including inflammation and vasculitis (inflammation of the blood vessels). AMN may be triggered by viral infections, autoimmune disorders, or certain medications.

What are the symptoms of AMN?

The main symptom of AMN is sudden vision loss in one eye. Other symptoms may include:

* Blurred vision

* Difficulty reading

* Difficulty seeing fine details

* Distorted vision

* Dark spots or floaters in the vision

How is AMN diagnosed?

AMN is diagnosed with an eye exam and a variety of tests, including:

* Visual acuity test

* Funduscopy (examination of the back of the eye)

* Optical coherence tomography (OCT)

* Fluorescein angiography (dye study of the blood vessels in the eye)

How is AMN treated?

There is no specific treatment for AMN. Treatment is aimed at reducing inflammation and improving vision. Treatment options may include:

* Corticosteroids (oral or injected)

* Immunosuppressive drugs

* Antiviral medications

* Photocoagulation (laser surgery to seal leaking blood vessels)

* Vitrectomy (surgical removal of the vitreous, the gel-like substance that fills the eye)

What is the prognosis for AMN?

The prognosis for AMN is generally good. Most people with AMN experience some improvement in vision over time, although some may have permanent vision loss.