Do Vampires Spy on you

In the First World Theory of 1978, Vampires were thought to have no eyes. But in recent history, sightings have suggested the evolution of the pupil. Their cravings of erythrocytes contained in the hemoglobin proposes that members of the Vampirus Anamelius Kingdom may perhaps go to great lengths to satisfy their thirst for the glucose sythetically produced in the blood stream. Hence, "spying" on their prey is not uncommon. Hope this helps.