Amaurosis Fugax Flashcards
What is Amaurosis Fugax?
A temporary, painless loss of vision in one or both eyes due to lack of blood flow to the retina, often described as a ‘blind coming down.’
What causes Amaurosis Fugax?
It is caused by a plaque or clot blocking an artery in the eye, often traveling from larger arteries like the carotid. Risk factors include heart disease, alcohol abuse, diabetes, high BP, high cholesterol, age, and smoking.
What are other conditions that can cause Amaurosis Fugax?
Optic neuritis, Ischemic optic neuropathy, Migraine headache, Brain tumor, Head injury, Multiple sclerosis (MS).
What are the symptoms of Amaurosis Fugax?
Sudden sweeping loss of vision, lasting seconds to several minutes, described as a gray or black shade coming down, followed by vision returning to normal.
How is Amaurosis Fugax treated?
Treatment depends on the cause. Prevention includes a low-fat diet, exercise, quitting smoking, and treating underlying conditions like high BP or diabetes. Blood thinners may also be prescribed.
How long does Amaurosis Fugax typically last?
The vision loss lasts a few seconds to several minutes and then clears slowly in reverse.
What is the optometric management of Amaurosis Fugax?
Urgent referral to a GP after excluding giant cell arteritis.
What is the primary concern when Amaurosis Fugax is caused by a blood clot or plaque?
The main concern is preventing a stroke.
What lifestyle changes are recommended to prevent Amaurosis Fugax?
Low-fat diet, Regular exercise, Quit smoking, Manage underlying conditions (high BP, high cholesterol, diabetes).
What is the classic description of vision loss in Amaurosis Fugax?
Like a blind or shade coming down over the eyes, with vision clearing in reverse.
