dirt in vision

i hope i can make myself clear in english... for a few weeks now i have kind of dirt that is coming from my left eye and following mu eye movements it is not there all the time but i can not find a pattern i can see nothing on the eye itself what can this be?

hello ayelet, It could be an opacity floating in the vitreous, inside your eye. You should have your eyes checked by your ophthalmologist. best regards, Dr. D.Rozenbaum

thanks. i have looked the wrods in the dictionary and can now even understand your answer. what could be the cause and how is it treated?