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.