We'll I'm afraid the answer isn't so simple, certainly in my case. Meares-Irlen Syndrome is a little difference for everyone, but there are a few very common visual symptoms, some of which I experience, but only with certain color schemes.
I say it's complicated because I don't experience a lot of the symptoms. I'm lucky in that I don't see letters and words don't move around on the page. Still, I read very slowly, mostly due to my tenancy to mix up and leave out words or lose my place. This isn't due to any visual distortions that I'm consciously aware of. I don't really know the reason for it, I just don't see the words.
This is the most common symptom that I experience, referred to sometimes as 'sparkle or washout'. Especially when I'm tired. It's not actually a circle, I just illustrated it like that to exemplify that it centers around the words that I'm focusing on. This symptom is quite active and fades in and out. It's much worse when I'm tired, stressed, or under some florescent lights. I almost always experience this symptom on a black on white color scheme.
Here is an example of another symptom 'shadows'. I've tried to draw it exactly as I see it, it's hard because the shadows move which is what makes it so distracting. So until I get better at animating, this is as close as I can get it.
This is usually described as 'Rivers', this is a fairly rare occurrence for me. I don't get it with the brown on black scheme, more with red backgrounds. Again this is as close an example of what it looks like that I can render.
