I haven't read through the other posts so I might be duplicating.
The loud sounds and sensitivity to it is actually a normal thing for the HG+ kids. Look up SI (Sensory Integration). There is therapy for this and especially if it appears to be extreme.
As for the eye issues: it is hard to say at this age. She could very well just be annoyed with you and refusing to look at you. Do you notice it when not in that situation? It can be a flag for the spectrum. But if that is all you are witnessing I would just practice with her and see if it improves.
