I am disappointed if the school has made you feel that this in-school behaviour is somehow yours to sort out (perhaps they haven't and they have simply let you know what is happening)
People you could contact to ask about this: the school nurse and/or health visitor, parent internet forums (this one is focussed on much older students). You could ask the school if they have considered a referral to educational psychology or specialist behavioural advisors (if they haven't, this might be a sign that it isn't actually that big a deal for them)
Please be assured that this isn't an unusual problem and although it sounds malign, your daughter may well be being something of a little scientist, or exploring the sensory experience rather than actively wanting to hurt anyone. Of course that doesn't mean that the other children will be comfortable with it, especially not with being poked in the eyes, so it does have to be addressed. That might mean the school needs to supply alternative sensory activities as a distraction (and perhaps you too at home)