I Get A Grey Haze That Comes Over My Eye

I get a grey haze that comes over my eye sometimes both eyes I have had test done but nothing thus far show up my ct scan show a small lesion I have trouble remembering things and can be confused at times... I do have graves also past experience with numbness and tingling on my ride side went to the hospital was told maybe a mini stroke I'm 49 years old and had a high stress job which I was advised by doctors to stop and find another with less stress which I have done. my symptoms are less but still happenening from time to time what could still be causing the issues I have described to you? Thanks for your time sincerely Holly