@Ceara..Accurate description of being able to 'see' the aura with both eyes.
However, recently I had what I thought was an 'unusual' migraine beginning, a dark ( shape in my left eye, and this would 'flash' suddenly in dim conditions.
I noticed more floaters {very different to migraine aura}...and left it three days hoping it would 'go away'.
I had only just had an eye exam at opticians. I googled the symptoms, and was terrified by what I read....it could be a detaching retina.
Hotfooted it to the Eye Hospital and they said it was a 'PVD' posterior vitreous detachment'...luckily {so far} without retina damage.
Then, six weeks later, another bizarre 'visual' migraine that was different to the usual shimmering type.....another trip to eye hospital to check...and a PVD in other eye.
If you get strange 'flashes' {Photopsia} in the temple side of your vision, and are aged 40 plus, it could be a possible PVD.
Get to an optometrist or even better, an Eye hospital asap.{damaged retina can be repaired if caught early}
I mistook the symptoms of PVD for a migraine..but migraine doesn't 'Flash', it scintillates and shimmers..and passes after 30/40 minutes.