I'm not sure about reading for me. Stress and being overtired don't make a difference. But sometimes I think patterns, like sunlight flickering through the shade of trees on the sidewalk, or when the sun goes through the window blinds, or the kind of lights that flicker before steadying, things like that make me more likely to have a seizure. I don't know.
I only have seizures when I'm sleep-deprived and off meds - seems to lower my seizure threshold.
But, visual stimulation (e.g., being in stores with fluorescent lights and lots of colors) is a HUGE trigger for me. I haven't had an aura for about 2 months, but it was always under similar conditions.