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Doctor insights on: What Causes A Sudden Black Out In Vision

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What causes a sudden black out in vision?

What causes a sudden black out in vision?

Many things: A number of conditions can cause a sudden blackout of vision. Most of these are vascular events affecting important structions in the visual pathway, such as retinal aretery or vein occlusion, hemorrhages, and vasospasm. We see with both our eyes and our brain, and these structures require perfusion of blood for oxygen, butrition and proper function. ...Read more

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Dr. Sandra Lora Cremers
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Dr. Richard Bensinger
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Vision (Definition)

Vision is a feature of a person's brain that allows him to see. He must have normal eyes, optic nerves (that stretch from the eyes to the back of his brain), and visual cortex (the vision center in the brain), in order to see properly. An ophthalmologist is a ...Read more


Dr. Sandra Lora Cremers
Board Certified
19 years in practice
1M people helped
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Possibly causes of split second black out in vision? Young, healthy, no risk factors of any kind. Taking .25 clonazapam. Have inactive Graves disease.

Possibly causes of split second black out in vision? Young, healthy, no risk factors of any kind. Taking .25 clonazapam. Have inactive Graves disease.

Many causes: This can be due to anxiety, the clonazepam (Klonopin), TIA (amaurosis fugax), etc. See your physician immediately to discuss your symptoms in detail and to review your risk factors as well as to undergo a complete neurological and ophthalmologic exam. http://www.nlm.nih.gov/medlineplus/ency/article/000784.htm ...Read more

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What could cause someone to black out, fully conscious in the shower. Lasted for less than a minute. Vision came back hazily at first and then fully?

What could cause someone to black out, fully conscious in the shower. Lasted for less than a minute. Vision came back hazily at first and then fully?

Postural Hypotension: Low blood pressure is a common cause of "blacking out" that can be benign--unless, of course, the person hits his/her head on the way down. There are many other reasons why one would black out: medications, malnutrition, stroke, low blood sugar, dehydration, diabetes, seizure, infection, fever, and more. See your doctor for a complete physical and blood work. ...Read more

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What causes vision black out and loss of balance?

What causes vision black out and loss of balance?

Vertebrobasilar art?: Transient obscurations of vision, especially on rapid standing, can cause a bilateral dimming of vision with lightheadedness. The cerebellum is a balance control center and is located in an area of the brain near the visual cortex. A vertebrobasilar artery occlusion could cause both symptoms. A neuro-ophthalmologist can check your mri. ...Read more

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Dr. Sandra Lora Cremers
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19 years in practice
1M people helped
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What could be causing this? When i stand up i get dizzy and start to black out and when my vision starts to clear, my lips and finger tips feel numb.

What could be causing this? When i stand up i get dizzy and start to black out and when my vision starts to clear, my lips and finger tips feel numb.

See your doctor: There could be many causes of these symptoms. Your blood pressure could be dropping when you get up quickly ("orthostatic changes"), your heart rate may be abnormal, or there could be other causes. Your symptoms need to be evaluated as soon as possible. I wouldn't drive yourself anywhere until you find out what is going on... ...Read more

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Why do I loose my vision when i black out?

Why do I loose my vision when i black out?

Lack of blood supply: The eye needs a good blood supply and most black outs are like fainting in which the blood pressure drops and you lose consciousness. At your age what are you doing to cause this? If these are spontaneous, then you should see your family doctor for evaluation. ...Read more

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Why does my vision go fuzzy and or black out when i stand up? It doesn't happen when i'm sitting down.

Why does my vision go fuzzy and or black out when i stand up? It doesn't happen when i'm sitting down.

This is : Called orthostatic hypotension. It means that your blood pressure to your brain suddenly drops due to gravity when you stand up. Discuss this with you primary care physician. ...Read more

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I'm seeing black out only on the right side of my vision, why?

Only able to y: Determine the cause by examining you eyes. Pay attention if it moves with eye movement or if there is any flashing lights associated with this. See an ophthalmologist for this. ...Read more

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Dr. Sandra Lora Cremers
Board Certified, Ophthalmology
19 years in practice
1M people helped
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