Bald Eagle – Haliaeetus leucocephalus – also known as Le pygargue à tête blanche (French), aigle à tête blanche (French), Amerikaanse zeearend (Dutch), Weißkopf-Seeadler (German), and Pigargo Americano (Spanish).
In the second picture you can see the nictitating membrane over the eye.
Eagles have eyelids that close during sleep. For blinking, they also have an inner eyelid called a nictitating membrane. Every three or four seconds, the nictitating membrane slides across the eye from front to back, wiping dirt and dust from the cornea. Because the membrane is translucent, the eagle can see even while it is over the eye.
Two eyelids and a circle of bones known as the sclerotic eye ring, [sic] safeguards the outer part of the eye called the cornea. The bald eagle shuts its outer eyelid while sleeping, much like a human. The inner eyelid is translucent and is referred to as a nictitating membrane. This membrane moves across the eye side to side every three to four seconds to help shield it and to keep the eye wet and clear…A bald eagles [sic] can close its nictitating membrane and then even look directly at the sun if need be to spot their prey.
Photo taken with the Canon Digital Rebel XT / 350D and a Sigma 175-500mm Lens on February 28, 2010 near Maysville, Iowa.