For all my ophthalmic migraine buddies, (mine is sort of a sparkly crystalline rhomboid that gets bigger and “closer” until it seems like I’ve passed through it) :

It’s good to know what it is and relax about it. BUT if one day you get something quite different from the usual, don’t assume it’s migraine. My dad got a weirdly different one, and it turned out to be melanoma in his brain. Finding out the truth didn’t save him but it bought him time to “get his affairs in order” for my mom’s sake and finish a book that was important to him