Visual or occular aura. Was flashing.

Dear doctors Pleasr describe the exact expeince of visual or migraine auras. What exactly happens and how can I understand if I am having the same. I have experience something similar to it thrice now, Almost a month apart from Each experience. It is like a zigzag pattern, big, looks like having a border, which sometimes look black and white but sometimes even colors can be seen in the big zigzag thing. They last for 5-10 minutes post which sometimes have slight throbbing in head, sometimes I don't. I visited ophthalmologist Who ruled it out as CVS. After which I also developed dry eyes and a few floaters, after fundoscopy (9th march, 2019) doctor asked me to ignore floaters. The dry eye problem is gone, but the floaters are there. I don't know if it is was aura or if it was lightning streak flashing. I am attaching a picture of what I might have seen. Please help me understand visual aura and whether what I saw was flashing.