The therapy may vary on the type of vision issues they are addressing.

With my convergence insufficiency, I meet for 8 weeks once a week for 1 hour each session.

In the first weeks, I got intense migraines afterwards, and I needed to rest before tackling the rest of the day.

In the second month, my therapy seems to have plateaued, and I am not really progressing now. The headaches are still here, but they are less intense and no migraines. But I have eye twitching and blurriness afterwards, so I know they are working hard.

I was told that it was important to go up to your "threshold" for these exercises, but I know I get anxious and haven't really done so.

Best of luck!