Amaurosis Fugax - Causes, Symptoms, Diagnosis, and Treatment

What Is Amaurosis Fugax?

Amaurosis fugax is a condition characterized by a temporary loss of blood flow to the eye. This will result in a person being unable to see through one or both eyes. Other names of amaurosis fugax are transient monocular blindness, temporary vision loss, and transient monocular visual loss. Usually, it is not a condition itself but rather a symptom of an underlying condition in which the blood supply to the eye is decreased.

You might have the question in mind, "Why does this happen?" This happens because the eye is not getting enough blood for a little while. The back part of the eye, called the retina, needs blood to work properly. The retina helps your brain turn light into the pictures you see. If the blood flow stops, even for a short time, your vision can disappear.

What Are the Symptoms of Amaurosis Fugax?

These are the symptoms of amaurosis fugax:

• Losing vision in one eye (monocular blindness).

• Vision looking dim, foggy, or blurry.

• Losing all or part of your sight for a few seconds, minutes, or (rarely) hours

• If it’s caused by swelling in the eye (papilledema), vision usually goes away just for a few seconds.

• If it is caused by a blocked blood vessel in the neck (carotid artery problem), vision can go dark for a few minutes.

Sometimes amaurosis fugax happens because of a TIA (transient ischemic attack). A TIA is like a mini-stroke. It happens when blood does not reach the brain or eye for a short while.

TIA symptoms can include:

• Trouble speaking.

• Drooping on one side of the face.

• Weakness in an arm or leg (usually one side of the body).

• Short-term blindness.

Even though the symptoms go away, a TIA is a warning sign for a real stroke. That is why it is very important to see a doctor right away.

What Causes Amaurosis Fugax?

The main cause of amaurosis fugax is a short-term blockage in the blood vessel that carries blood to the retina (the part of the eye that helps you see). When blood flow is reduced, vision can go dark for a while.

Some common reasons include:

• Blood clots that block the blood flow.

• Carotid artery disease (narrowing of neck blood vessels because of plaque buildup).

• Heart problems, like an irregular heartbeat (atrial fibrillation).

• Very low blood pressure.

• Spasms or swelling in blood vessels.

What Are the Risk Factors Related to Amaurosis Fugax?

The most common risk for amaurosis fugax comes from heart disease. If someone has heart problems, they are more likely to have short-term vision loss.

Other major risk factors include:

• High blood pressure.

• High cholesterol.

• Smoking.

• Heavy alcohol or tobacco use.

However, it is important to note that various other health issues can occasionally trigger amaurosis fugax.

• Brain tumors (growths in the brain).

• Head injuries (past trauma to the head).

• Multiple sclerosis (MS), a disease in which the immune system damages the protective covering of nerves.

• Lupus (a condition where the immune system attacks the body’s own tissues).

• Migraine headaches (severe headaches that can affect vision).

• Optic neuritis (swelling of the optic nerve).

• Polyarteritis nodosa (a disease that affects blood vessels and can block blood flow).

What Tests Will Be Done to Diagnose Amaurosis Fugax?

If your doctor thinks you might have amaurosis fugax, they may do several tests, mostly to check your blood flow and heart health. These may include:

• A full physical examination of the eyes.

• Blood tests (to check blood count, sugar levels, and how your blood clots).

• Imaging tests like ultrasound, magnetic resonance imaging, or computed tomography scans to look at blood vessels.

• An electrocardiogram (ECG) to check your heart’s rhythm.

• Tests like C-reactive protein (CRP) and sedimentation rate (ESR) to look for inflammation.

How Is Amaurosis Fugax Treated?

The treatment for amaurosis fugax depends on the cause. If it is linked to a blood clot or plaque, the main goal is to lower the risk of stroke.

Here are some key steps:

• Eat a healthy, low-fat diet and limit alcohol (no more than one to two drinks a day).

• Exercise regularly, about 30 minutes daily if you are at a healthy weight, or 60 to 90 minutes if you are overweight.

• Quit smoking completely.

• Keep your blood pressure under control. Most people should aim for below 120 to 130/80 mm Hg.

• If you have diabetes or a history of stroke, your doctor may set an even lower target.

• People with diabetes, heart disease, or artery problems should aim for low-density lipoprotein (“bad”) cholesterol below 70 mg/dL. Some experts suggest going even lower (under 55 mg/dL).

After proper diagnosis, if there is any systemic disease or vascular disease, then the first treatment of the condition and cause should be done. If hypertension, diabetes, or hyperlipidemia (increased lipid in the body) is present, these should be corrected. In most asymptomatic cases, conservative treatment gives relief to the patients.

Medications such as anticoagulants are enough in mild cases. If the reason for amaurosis fugax is an atherosclerotic lesion (presence of plaque accumulation in the blood vessel), then Aspirin (Acetylsalicylic Acid) is the treatment of choice for such patients.

Can Amaurosis Fugax Be Prevented?

You cannot always stop amaurosis fugax from happening, but you can lower your risk by taking care of your health.

The following are some ways to lower your risk:

• Control health problems like high blood pressure, diabetes, and high cholesterol.

• Eat healthy foods.

• Maintain a healthy weight.

• Stay active and exercise regularly.

• Quit smoking.

• Limit alcohol.

Living With Amaurosis Fugax

Living with amaurosis fugax means paying close attention to your health. Since it can be a warning sign of stroke or other problems, it is important to follow your doctor’s advice, take medicines as prescribed, and keep regular checkups. Eating healthy, staying active, and avoiding smoking or too much alcohol can make a big difference. If vision loss happens again, seek medical help right away.

Conclusion

Amaurosis fugax is a symptom of different conditions, but it is not a disease. However, ignorance of symptoms can be detrimental to patients. So, an immediate diagnosis of the underlying cause is mandatory. After proper diagnosis, prompt treatment of symptoms and causes should be done to avoid further complications.

Key Takeaways From iCliniq.

• Amaurosis fugax is a temporary vision loss often linked to reduced blood flow to the eye.

• Amaurosis fugax can be a warning sign of stroke or other serious health conditions.

• Healthy lifestyle habits and proper medical care can help lower the risk.

• Consult an eye specialist at iCliniq for timely diagnosis and personalized treatment.