The ureteric ring.

A ureteric ring is a smooth, concentric ring-like narrowing occurring in the upper third of the ureter. It is nonobstructive and may be transient and bilateral. There is a slight female preponderance.

Clinical and radiologic lacrimal testing in patients with epiphora.

Objective: The purpose of the study is to assess the strengths and weaknesses of selected clinical and radiologic lacrimal tests in patients with epiphora.

Design: The study design was a prospective clinical trial.

Participants: Fifteen patients with epiphora (N = 27 eyes) were studied.