It's fascinating that you were still able to read without seeing! I've had migraines about every two months for the past 12 years, and with very few exceptions they've always followed the same pattern: 30 minutes of scotoma (small to large to small), 30 minutes of peace, then a strong headache for about an hour. I usually still have a mild headache the next day.

I've had the migraines mostly while sitting an the computer or reading, but it seemed impossible to me to continue to read since the zig zags were right above the letters, and frankly quite distracting. Because of that, I've never really tried to continue.

It seems weird to say that, but I'm almost looking forward to the next migraine solely to test if I can still read if I really try. That would be awesome! Thank you for your description!