DW suffers from migraines, so I can appreciate your concern. Probably the best thing to do would have her close her eyes at that point. Most of the scenes are of very short duration, seconds, in fact, since the whole ride is about 3 minutes long, so closing ones eyes for those short moments might do the trick. There is really nothing else to look at since the screen takes up most of the area in front and on the sides of the ride. My sympathy to your daughter, I know bad those migraines are.