<prompt> A total of 5000 patients of glaucoma are identified and surveyed, including interviews regarding family history of glaucoma. Such a study design is calledCase series repoCase control studyClinical trailCoho study  <response>: A case series also known as a clinical series is a type of descriptive study that tracks subjects with a known exposure, such as patients who have received similar treatment or examines their medical records for exposure and outcome. 