Eagle eye to the tear duct”. Eagle tears moisten the eyes and contain the chemical lysozyme which protects against salt water and also destroys bacteria, thus preventing eye infections. The nictitating membrane acts a sweeping wiper across the eye. The eagle iris is a pale yellow color, much lighter than human eyes. Both eagles and humans have a white area called the sclera, but in the case of eagles, it is hidden below the eyelid. Eyelid openings are oval-shaped in humans, while they are round in the case of birds' eyes. Most eagles have excellent vision. Generally, eagles do not suffer from
The Mind's Eye & Mission of the Viyrans audio dramas "Urgent Calls", "Urban Myths" and "The Vanity Box". This story marks the first appearance of the Viyrans for Big Finish. They first appeared in the short story "No One Died", also written by Nicholas Briggs, featuring the Tenth Doctor and published in the 2007 Doctor Who Storybook. The Viyrans return against the Sixth Doctor in "Patient Zero". The Mind's Eye & Mission of the Viyrans The Mind's Eye is a Big Finish Productions audio drama based on the long-running British science fiction television series "Doctor Who". It is a three-part story written by Colin Brake and was released