Definition: Cystopyelography is a diagnostic imaging procedure used to assess the presence or absence of a cyst in the lower eyelid. It involves using an X-ray machine to create an image of the eyelids, including the eye and its contents such as the eyelashes and eyelid skin. The purpose of this examination is to determine if there is a visible internal structure within the eyelid that could be a cyst or other abnormality.