venus thrombosis. that means she had a blood clot on the brain. because of that she began anti-coagulation therapy, to dissolve the clot. as a result secretary clinton experienced double vision for a period and she therefore benefitted from wearing glasses with a frinel prism. here is the part the doctor says she is all better. secretary clinton s concussion symptoms including the double vision resolved in two months and she discontinued the use of the prism. she had follow-up testing, she hatd follow-up testing which revealed complete resolution of the effects of the concussion as well as total dissolution of the thrombosills, the blood clot. she tested negative for all clotting disorders so that s the doctor saying there was no underlying condition that led her to get the clot she is not going to get more blood clots. but the doctor says it was decided to continue her on daily