The visual disturbances I get at the start of my migraines change over time. The classic glittering arc rarely happens now, I usually get a jagged chrome-bright mark in the upper left side of my vision, other times I get more of a coloured smear, usually in the same place. If I get a migraine in my sleep, which I often do, my ‘dream vision’ goes completely and in my dream I can’t see at all. It’s like nighttime, or like I’m blind.
The last few weeks though I’ve been getting what I can only describe as a large water-mark at about 7 o’clock on my vision. This change has coincided with a sharp increase in migraines too.