As from the history your baby is having a small swelling adjacent to the cornea in the white part of the eye, conjunctiva
. If symptoms suggestive of inflammation like pain, redness, watering are absent, no need to worry you can monitor wait and see as advised by your doctors.
It can be a because of small fingernail injury
or because of allergy
affection of the conjunctiva which may resolve on its own. Since it is not causing any symptoms you can observe it, if it wont resolve then please do consult ophthalmologist