The Eye of the Eagle

Abstract

This paper describes in detail the various antiglare devices in the eagle's eye. For example, the corneal stroma scatters much less light than that of man. The pigmented nictitating membrane probably works to shield the sun's rays when the eagle is very high. That exaggerated foveal pit functions to keep stray light from the receptor at the bottom of the depression. Other antiglare devices included elongated photoreceptors, sheathed with pigment, and a pigmented section membrane in the vitreous.