Astigmatism old ages

some of the part in the movie are not appropriate for all ages.

Odin sacrificed on of his eyes at Mímir's spring for gaining the Wisdom of Ages.

In Norse mythology, Odin sacrificed his eye at Mimir's spring in order to gain the Wisdom of Ages.

"Seeing Eye" is a trademark for The Seeing Eye, a guide dog training school in the U.S. It was founded in 1929. Only dogs trained by the Seeing Eye can properly be called "Seeing Eye dogs."

Guide dogs in general have been trained since at least as early as the middle ages.