Question for the vision therapy folks

We've started vision therapy - last week was the first session. DS did fine at the session, cooperated with the therapist (although he didn't want to make small talk with her).

But the home exercises are a challenge. He doesn't want to do them - they are both boring and hard for him to do. There are tears. He says they make his eyes sore.

I feel bad, but I also feel it's something we need to do. Any tips or suggestions for getting through the homework part of vision therapy?