Over the past few months I've started experienceing what is known as "visual aura" or visual migraine", taking the form of what is known as scintillating scotoma.

http://en.wikipedia.org/wiki/Scintillating_scotoma

Basically, it consists of a jagged, quite colourful, flashing and moving light field image that covers up to nearly the whole visual field. It's actually not at all dissimilar to the sort of effects seen when using psychedelic drugs such as LSD. The one I'm experiencing at the moment started as a barely visible distortion in the centre of my vision and has spread over the past 15 minutes to cover most of the right side of my visual field. Thankfully, I can at least partially touch-type.

I've never experienced migraines in the past and I don't get any migraine pain following these incidents, as some do.

Has anybody else experienced this sort of thing? It's quite disconcerting and makes it very hard to drive, since the scotoma tends to make it hard to concentrate on moving objects, as well as obscuring part of the visual field.

I'm also a little worried, since this the frequency seems to be increasing, as does the severity.

Anti are you for real, get to a doc asap, it's likely nothing but the ramifications on your ability to do tasks that invole field could kill you or, one around you.

Anti here I am giving you advice about field and I put a "," in the wrong spot, but in my defense my lack of field was alcohol driven.

Anti re the Scintillating scotoma, mine are a shimering of distant objects as if viewed in an arid geography, the heat makes the objects shimmer or wave like a mirage, if you have ever experienced that, but no colours or flashes are involved and if I close my eyes relatively quickly for a few minutes it often goes away, but I have to avoid strong artificial or sunlight for a while after.

Christ Antiseptic, are you still alive son...please don't answer if your not!

strange you should mention it
this year i have had the very thing you describe
[less than ten tim,es]..and no 'migrane'..after

i of course like you hadnt given it much thought[or concern]
so read the link with intrest..[a link at the bottum fits in with my thinking on it]
http://imigraine.net/migraine/withaura.html

and while.it dosnt go as far as my thinking[ok speculating] on it
it sounds like medicine cant offer much of a solution on it either

they as a rule dont last long for myself
and im not about to go talk to some quack about it
and have them speculate on it

but encourage you to check it out
if its a worry or a danger

i cwertainly wouldnt risk driving on
if one began while driving..but mine seem tro occure when im resting[after doing strenious activity..or intensive problem solving]

but of course i have had so few
i havnt given it any serious concern
[for me its either a stress thing..[so worry wont make it better]
or the beginning of some phycic 'opening'

[to me the jagged arch..looks filled with colours
not in the center of my vision..but rather just outside my line of vision[and no 'blanke spot or other thing]

its just an arc..in a jaged line.
.much like a stress fracture in the fabric of time/spece]

[see why i refuse to explain it to some quack?]
who is likely to put me on lsd or some other chemical[lol]

i seem to recall some mention of it
in the many phycic litritures i have read
but the egsact phrasology escapes me..never the less its well mentioned in much paranormal litreture...[the key being for me 'aura']