Thank you for your query.
In my opinion you need not worry for the redness
if it is not increasing or causing any problems to your daughter. Had it been conjunctivitis
then it should have increased and there should have been some discharge from the eye. You can clean the eye with luke warm water frequently.
I hope I have answered your query to your satisfaction.
Wishing your daughter all the best.
Rajiv K Khandelwal