A 3-month-old boy is brought to the clinic by his mother ...

A 3-month-old boy is brought to the clinic by his mother because "ever since the child was born he has had constant tearing from both eyes." She tells you that when the baby wakes up in the morning there is a small amount of watery discharge at the medial corner of his eyelids and that she must wipe the child's eyes multiple times throughout the day. ................
................