did-you-kno:

Zeus is a blind Western screech owl whose eyes look like the night sky. 

He was diagnosed with conjunctivitis, corneal degeneration, endotheliopathy, and anterior uveitis, most likely caused by a traumatic event like flying into something or being attacked by a predator.  

His general condition is a capsular cataract and the white flecks that glisten in his eyes are the result of fibrin and blood pigment clots. These pigments cause a unique appearance that some have described as a “view of the Universe” quality in his eyes, which he is now well known for. 

Zeus’s condition does not cause him pain and he’s otherwise completely healthy.

Source