Hello Welcome to Health care Magic. I reviewed your history. It seems from the history that you are having recurrent episodes of white out of vision associated with dizziness. These symptoms indicate transient ischemic attack. The common causes to be considered are hypotension, hypovolemia, anemia, vascular diseases..... Since these attacks are recurrent evaluation is required to find out the underlying cause and treatment accordingly. Systemic evaluation including cardiac evaluation is advised to find out the underlying cause. Hence I advice you to consult your doctor for examination and treatment accordingly. Hope this is helpful to you. Do write back to me for further questions. Thank you With regards