What should i do if the scratch under my daughters eye won't heal?

See an eye MD: I don't have enough information. If it is on the eyeball, it could be a variety of things, and if it on the eyelid, it could be other things. To guess at a diagnosis is of little benefit to your daughter and my best suggestion is to see an ophthalmologist.

See your PCP: Your PCP will probably refer you to a specialist. The wound should be kept clean and dry and if it is possible to apply a thin layer of antibiotic ointment three times daily to the area until seen, it may help the healing process.