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What could cause transient binocular vision loss?

I have episodes of transient binocular vision loss. The progression of an episode is very predictable: I start noticing some letters missing in text. Slowly, it evolves to a point half of my vision is gone (for example, can't see my own right hand in front of me). It then improves until I can see perfectly again. All that lasts from 1 to 2 hours.

Those episodes happen once each 2 to 3 months. Sometimes I have almost a yer without one, sometimes I have 2 in a week. The episodes happen unpredictably and I couldn't associate a single variable to their occurrence. Sometimes I'm nervous, sometimes I'm happy. Sometimes I'm hungry, sometimes I'm not. Once I woke up with it. Nothing to correlate so far. This started when I was 15 years old, after I did a very wild, unhealthy diet based on "diet shakes". I almost starved and lost 20kg from obese to normal. It is probably related, but maybe not. I am 23 now. I probably had around 40 episodes so far.

I visited dozens of doctors already. Eyes checked, fine. I have done 3 brain MRIs, including one a few minutes after an episode, at the hospital. Fine. Nobody knows what I have, so I'm wandering around the internet - maybe here someone has an insight?
2 Responses
144586 tn?1284666164
The most probable etiology is an intermittant spasm of a blood vessel. Since the vessel is not constricted during the scan the scan will show normally. Even a few minutes after an episode there would be normality. Incidentally, you need a dye MRA, and not an MRI. An opthamological neurologist should be able to identify the probable blood vessel. The etiology of the constriction is something else. It could be a structure that becomes periodically inflamed, squeezing the vessel due to infection of abnormal growth. Check your D3 levels. While unlikely, non-existant levels of D3 can precipitate spasms. You might try taking three grams of L-Arginine when you have an episode. This amino acid is a precursor of nitrous oxide, which relaxes and widens vessels in the microcirculation. Keep seeking professional opinions.
1 Comments
Hey, thank you very, very much. That is by far the most knowledgeable opinion on my issues. On the case you are right, what is going to happen to me? I'm ok with whatever is the answer.
144586 tn?1284666164
I came across a similar case in the literature. Micro-clots were being developed in the heart, thrown off and were dissolved by the body in a short period of time. Essentially, TIA's. When dissolved there will be a normal MRI.
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